04 silverado service 4wd

If the actuator does not engage the front axle assembly within 10 seconds, the TCCM sets DTC C0379, illuminates the "Service 4WD" light and disables the 4WD system. There have been reports of vehicles with front drive axle actuator assemblies that take longer than 10 seconds to engage, setting this code. Correction.

However, the day after I bought it, the "Service 4wd System" message popped up. I took the transfer case out, did the pump rub fix and installed a new (doorman because I couldn't find anything better) shift motor and encoder to put in there. Boom. Problem solved! No more "Service 4wd System" messages and everything worked perfectly!08 silverado service 4 wheel drive just popped up. I plowed the last 2 days and toggled bewteen 2wd and 4wd with no issues. This morning I tried to switch to 4wd drive and realized it wasn't engaging. The "service 4 wheel drive" message popped up and the knob to change from 2wd - 4wd light was stuck on 4wheel drive (i turn it to 2wd drive …Chevrolet Silverado 1999-2006: How to Use OBD Scan Tool, Reset Service Engine Soon and Change Engine Oil Light. The OBD-II port is your access into the vehicle's computer system. Depending on your scan tool, this diagnostic port will allow you to check diagnostic codes, view freeze frame data, and possibly watch live data from vehicle sensors.If no power, check the 4WD fuse for being blown or an open in the Brown wire. 3. Check for a chassis ground on the Black wire. 4. If OK, plug the actuator back in and probe a meter on the Light Blue wire. With the vehicle in Two Wheel Drive (2WD), there should be 12 volts there.Worst 2004 Chevrolet Silverado Problems #1: Speedometer Doesn't Work 2004 Silverado Average Cost to Fix: $400 Average Mileage: 64,000 mi. Learn More #2: Transmission Failure 2004 Silverado Average ...Step 1: To engage the 4WD on your Silverado, you’ll need to ensure that the transmission is in the park. If it isn’t, then you can easily shift into first gear and get going while still living a normal life without using four-wheel drive. Step 2: Look at the front of your transfer case and you will see a round knob with four positions, each ...163 posts · Joined 2009. #1 · Sep 3, 2012. I have a 2003 Silverado 1500 4.8L 4WD. For the last year or so my "Service Brake System" light will come on randomly. Sometimes when I hit bumps, sometimes when I'm driving down a smooth highway. When it comes on, it will chime for a good five minutes. Its very annoying.Aug 19, 2016 ... Brought the truck in last week for this problem. The fix according to the invoice was to update transfer case control module code k69. To no ...

1 post · Joined 2023. #8 · Jan 7, 2023. ribrown said: Hi guys and gals. My 2014 Silverado 1500 has the electronic 4wd shift knob. I recently switched it from the normal 2wd position to the 4wd high position while driving on soft grass. When I went to shift the truck back from 4wd to 2wd, the truck itself never disengaged out of 4wd.5. ***Changed Transfer Case Control Module in dash left of cluster behind 4WD switch. 1st noticeable, yet disappointing effect: a. "Service 4WD" message went away. b. Lights on 4WD Switch all came on and then indicated 2HI. c. After brief and slightly ridiculous celebration I attempted to actually test the system.#02-04-21-006E: Inoperative 4WD/AWD Lamps, Inoperative 4WD/AWD System, DTC C0550 Set No Communication with TCCM (Reprogram Transfer Case Control Module) - (Jul 20, 2006) ... 2002 Chevy Silverado 4x4 with Service 4wd light illuminated. Tried replacing push - button with known good one, no change. Also tried an encoder motor replaced, but no change.Service 4wd light on. 2000 Silverado. Silverado & Fullsize Pick-upsThe Silverado has been one of the best selling trucks in the US for decades, and is truly proven to be "like a rock". Platform: Truck, GMT 400, 800, & 900. Chevrolet Silverado GMT800, GMT900, and K2XX 4WD General Information and Maintenance Schedule.So I have a 2000 GMC Sierra 2500 6.0 with the 4L80e an a few days ago I had a service four-wheel drive light come on, and my selector switch lights went off I went through all diagnosis of checking fuses and the grounds I changed the select button switch and I think it ended up being the transfer case control module was honestly the last thing that it could be.After reconnecting the TCCM harness and the battery, you can start your vehicle and check for the “Service 4WD” message on the dashboard. If the message has disappeared, that means the issue has been successfully cleared. 4. Remove the Knee Bolster and Dash Bezel. First things first, you’ll need to remove the dash bezel.

Detailed specs and features for the Used 2004 Chevrolet Silverado 2500HD Crew Cab including dimensions, horsepower, engine, capacity, fuel economy, transmission, engine type, cylinders, drivetrain ...Download, print or view the 2004 Chevrolet Silverado 1500 4WD 5.3 Workshop Manual PDF for free. ServicingManuals stores hard to find service manual's for everyone to search and view.Service 4wd light on. 2000 Silverado. Silverado & Fullsize Pick-upsThe Silverado has been one of the best selling trucks in the US for decades, and is truly proven to be "like a rock". Platform: Truck, GMT 400, 800, & 900. Chevrolet Silverado GMT800, GMT900, and K2XX 4WD General Information and Maintenance Schedule.Nov 18, 2017 ... Step by step instructions on how to replace the front 4x4 actuator on your '99-'12 GM trucks. Product links below!Step 1: Park The Car. To effectively diagnose issues with the 4WD system, it is recommended to park the vehicle in a suitable location. A parking lot can be chosen for this convenient and simple DIY test. Step 2: Engage 4wd System. To effectively engage the 4WD system, start by keeping your vehicle neutral.

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Does anyone know if the Service 4WD issue is the same for the 1999 Silverado 1500? The service 4wd light came on in my wife's truck yesterday. ... DTC B2725 Set (Replace Transfer Case Shift Control Switch) #02-04-21-004 - (Apr 15, 2002) "Service 4WD" Indicator Illuminated, DTC B2725 Set (Replace Transfer Case Shift Control Switch) 1999-2002 ...Used 2004 Chevrolet Silverado 2500 Extended Cab pricing starts at $4,741 for the Silverado 2500 Extended Cab Work Truck Pickup 4D 6 1/2 ft, which had a starting MSRP of $30,820 when new. The range ...2013 Silverado 1500 LT, Z71, 5.3L, 6L80e, 4X4, HD Towing pkg If you can't fix it with a hammer, it is an electrical problem. ... The selector switch showed it in 4HI, and I didn't get any service 4WD system message. I was a little worried about how expensive this repair might be. I figured I'd start out with the cheapest part (the 4WD actuator ...Eventually, the Service 4WD message began appearing on the dash. It is intermittent and completely random. Basically what happens is when I start my truck, I can shift between all of the 4x4 modes using the selector switch. After a short period of time, which can range from 15 or so seconds, to 30 minutes, the Service 4WD messages …

Buy 901-062 4WD 4x4 Switch Replacement for Chevy Silverado 1500, 2500HD Suburban, Avalanche, GMC Sierra 1500, 2500, Yukon- 4 Wheel Drive Switch Transfer Case Selector, OE# 15709327, 19168767: Four Wheel Drive ... Fixed the "service 4wd" light in message center. The original equipment is known for having bad solder joints that crack.May 5, 2018 · 5. ***Changed Transfer Case Control Module in dash left of cluster behind 4WD switch. 1st noticeable, yet disappointing effect: a. "Service 4WD" message went away. b. Lights on 4WD Switch all came on and then indicated 2HI. c. After brief and slightly ridiculous celebration I attempted to actually test the system.8705 posts · Joined 2015. #2 · Sep 14, 2022. Are you using a code reader that can read codes from all the computers in your truck? Basic ones won't. 2004 Sierra 3500 dually, 6.0L extended cab, cab&chassis flatbed, upgraded to 4wd. 2012 Silverado 3500 dually, 6.0l, crew cab, long box replaced w flatbed. D.I have a 00 silverado for 10 years now with 105000. When 4wd engages, be it auto or push buttoned in to 4wd, the front seems to lock like posi traction. The steering wheel can be very hard to turn. Pr … read moreUsed 2004 Chevrolet Silverado 2500 HD Regular Cab pricing starts at $8,298 for the Silverado 2500 HD Regular Cab Work Truck Pickup 2D 8 ft, which had a starting MSRP of $25,940 when new. The range ...Chevy Silverado Forum (GMC Sierra) 04 Silverado 4WD noise and Service 4WD light. Jump to Latest Follow 21 - 25 of 25 Posts. 1 2. j cat · Registered. Joined Sep 28, 2010 · 7,411 Posts #21 · Apr 7, 2015. Only show this user. like I said the front sensors bad throw the ABS light on real fast also severe braking issues you will not stop since ...2004 chevy service 4wd. Answered in 7 minutes by: Chevy Mechanic: Jerry Newton. There are scan tool diagnostics for the 4WD system. It's impossible to diagnose 4WD faults without knowing the fault codes that are present, and they can only be retrieved with a high quality scan tool. Common failures on this model and year are the 4WD switch on ...2003 Silverado HD Service 4WD comes on. 2003 silverado HD extended cab 2500. 83k miles Service 4wd message appears and no yellow lights showing and cannot go into 4wd. It has been doing this off and on now for about a month but it is lasting longer. Eventually it will go into 4wd.9 posts · Joined 2017. #1 · Apr 9, 2017. OK. 2004 Silverado 1500. Problem started with not being able to shift from 2WD to 4Hi. Finally went, cannot shift out now. The dreaded "Service 4WD" light came on. Checked fuse, good. Checked codes and got the following: Bo790 Transfer Case neutral Indicator circuit and C0321 Transfer Case Lock Circuit.Just bought my 07 GMC over the weekend and am having a problem with the 4WD. I drove to class this morning and it was raining out so I tossed it into 4 Auto. About a minute later the message came up saying to service four wheel drive. I have been in and out of 4WD a few times to test the functionality with no issues before.The steering column cover on the Chevy Silverado is divided into two pieces. The cover's primary purpose is to protect the many components within the cover, such as the ignition sw...

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With Option Code #NP2. *** Call Zumbrota Bearing and Gear at 1-800-658-2537 ext. 125 for customer service, availability and technical assistance *** PRICE: 1371.99. ... With Option Code #NP2. With Part Time 4WD. Without Electric Shift, . ***Call Zumbrota Bearing and Gear at 1-800-658-2537 ext. 125 for customer service, availability and ...2800km on the odo. 2015 Canyon SLT. Leather/Nav/Bose v6 4x4 Onyx Black. Spray in liner and soft tonneau. 2" level kit, 275/65/18 ko2 (minor rubbing at full lock) 20% tint on front, air dam removed, nfab nerf bars, GM skid plate, superskidz front skid plate. 6k hid kit from dd, led fogs.Eventually, the Service 4WD message began appearing on the dash. It is intermittent and completely random. Basically what happens is when I start my truck, I can shift between all of the 4x4 modes using the selector switch. After a short period of time, which can range from 15 or so seconds, to 30 minutes, the Service 4WD messages comes on the ...Immerse yourself in modern luxury, elegant style and high-tech amenities at the York Luxury Suites Medellín, located in the exclusive El Poblado area; Awarded for best service "2024 Excellence Awards Winners: The American Winner Best Service." Relax in one of the 111 contemporary suites, offering pet-friendly floors with modern spaces and ...Oct 25, 2018 ... in this video we replace the encoder motor for our 2004 chevy avalanche... the avalanche is having some 4x4 issues which we are trying to ...If the actuator does not engage the front axle assembly within 10 seconds, the TCCM sets DTC C0379, illuminates the "Service 4WD" light and disables the 4WD system. There have been reports of vehicles with front drive axle actuator assemblies that take longer than 10 seconds to engage, setting this code. Correction.Dorman OE Solutions Transfer Case Control Module - Remanufactured - 599-114. Part #: 599-114. Line: DOR. 5.0. (1) Check Vehicle Fit. Transfer Case Control Module 4 Wheel Drive; With RPO Code: NP8 (2 Speed, Push Button Shift Transfer Case); Four Button Selection Switch.Find 281 used Chevrolet Silverado 1500 in New London, CT as low as $13,950 on Carsforsale.com®. ... 2016 Chevrolet Silverado 1500 4WD Crew Cab 143.5" LTZ …16 posts · Joined 2015. #1 · Oct 29, 2015. Hey I'm new here, I have a 2003 Silverado 1500 with 204,000 miles on it. I bought it last September with 180,000 miles on it. Nothing wrong except rust and dents. Once it got to 200,000 miles it started to get a lot of problems. It has evap problems, I want to say it's just vacuum lines with small ...

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DIC says "Service 4-Wheel Drive" 2004 2500HD. ... 06 Chevrolet Silverado CCSB 4wd - Old Trucks: 1 - LB7, 3 - LLY, 2 - LMM, 1 - L5P. Save Share. ... General Discussions 01-04.5 LB7 Duramax Powertrain New Member Introductions Exterior Build Threads. Top Contributors this Month View AllI spoke with a few mechanics and all agreed that it was the Transfer Case Encoder Motor. I took it to the dealer to confirm this was the problem and it was. They wanted $800 to fix it. The special thing about the 2007 Silverado 1500 that i learned is, one model has an Transfer Case Encoder Motor and one model has a Transfer Case …Silverado 1500 RST Crew Cab Short Bed 4WD. $42,855. Excellent Price. 33k mi. 47 mi away. Menu. Add to favorites Share Quick view See actual pricing. Used 2021 Mazda. …johnlazelle Discussion starter. 12 posts · Joined 2013. #1 · Sep 21, 2013. Hello all, Recently when i went to take our 2002 GMC Yukon XL 1500 out of 4wd, i lost all lights on the transfer case control switch and the service 4wd light came on in the panel. I replaced the transfer case control switch, but that did not solve the problem.The Silverado EV WT, launched last year for fleet customers, offers 510 hp and 615 lb-ft of torque. The line will sprout a Trail Boss variant next year. The Silverado …Measuring the nut puts it a little over 35mm. A 35mm socket might fit depending on the tolerances of the socket itself. 36mm seems to be a better bet. Thanks for all the input. 04 Silverado LT 4WD CrewCab. 5.3L 4L60E Trans. If you think hiring a good aircraft mechanic is expensive, just wait until you hire a cheap one!Step 2 - Remove the axle actuator. Use a flat head screwdriver to un-clip the tab on the axle actuator's wire harness connector. Then, pull the connector toward you to remove it. Using a pair of slip joint pliers, loosen the actuator by rotating it counterclockwise. Once the actuator is loose, unscrew it by hand and remove it.Dreaded service 4wd message. Jump to Latest Follow ... I have an 04 silverado 1500 LS with electric 4x4. But before I get flamed.. I've done as much research on the matter as I can before I got to this point. ... ('03 Silverado 1500 LS) a couple of years ago, and I had to replace some of the wiring and all the connectors (soldering everything ...Jan 29, 2012 · 26 posts · Joined 2011. #1 · Jan 29, 2012. 04 Silverado 4x4 transfer case stuck on neutral. Just replaced the transfer case. The original one locked up while driving. I got a new one and put it in but it is stuck in neutral. I can hear the encoder motor switching between 2h and all when I push the different buttons but it is still in neutral.Step 1 – Check your wheels and tires. They could be under-inflated, bent, or damaged. Tires and wheels cause 80% of abnormal vibrations reported to dealerships every year. The reason for this is that the tires and wheels are the only two elements that not only connect your Silverado to the road underneath you, but they also absorb the entire ... ….

This article applies to the Chevy Silverado GMT800 (1999-2006). The transfer case is located to the rear of the transmission and contains two yokes. The rear yoke connects to the rear drive shaft, which is always engaged because it controls the rear axle in 2WD. When you switch the truck into 4WD, the transfer case control module forces the ...2004 Chevy Silverado Z71 stuck in 4 low. My truck has had the service 4WD light on for some time now, I haven't been able to shift into 4 wd, but the other day I got stuck and was able to shift into 4 low but now cannot get it to shift back. I have tried the disconnecting the battery trick and that didn't do it.Vehicles with Service 4 Wheel Drive Message and service bulletin. 2009 Cadillac Escalade Hybrid. 2007–2009 Chevrolet Avalanche, Silverado, Silverado Hybrid, Suburban, Tahoe, Tahoe Hybrid. …2003 Silverado "Service 4WD". I've had a bit of an issue with my 4WD lately, with the 13"s of snow we got over the holiday it's definitely time to try and track down what the issue is. On my truck, every now and then, the 4WD indicator will stop lighting up/working and the message "Service 4WD" displays on the DIC.Stuck in 4 low. 2007.5 vortec max. Had the truck in the garage doing tire rotation. Put it in 4 low and blocked the front wheels while I had both rear wheels off the ground. Finish the job and start the truck...service 4wd message. Indicator dial will light up in all positions but also stays lit in 4low. Drive it around a bit to see what happens.04 chev silverado, 4WD is inoperative sometimes, comes up with the service 4wd on the dash, but other days it works - Answered by a verified Chevy Mechanic. By chatting and providing personal info, ... My 2003 silverado z-71 has the service 4wd message come up almost every day or so, ...My 2009 Wrangler got stuck in 4WD. Happened twice. First time dealer repaired it with a $0.25 plastic clip under warranty. Last time was a few months ago, temporary fix involved some zip ties, "permanent" fix cost me $2 plus $6 shipping, but I purchased 2 extra parts for the next time.Chevy: inoperative..service 4wd..shift back to 2wd it comes..switches. 04 chev silverado, 4WD is inoperative sometimes, comes up with the "service 4wd" on the dash, but other days it works fine, i can shift into 4wd no … read more. Aran. 04 silverado service 4wd, 2004 chevy silverado 4wd problem. Service 4wd light on and switch selector will not change. Replaced dash board switch, encoder motor and wiring under the truck to the encoder motorr. With new encoder … read more, 2004 chevy silverado 4wd problem. Service 4wd light on and switch selector will not change. Replaced dash board switch, encoder motor and wiring under the truck to the encoder motorr. With new encoder … read more, Mar 5, 2011 · 2004 chevy silverado 4wd problem. Service 4wd light on and switch selector will not change. Replaced dash board switch, encoder motor and wiring under the truck to the encoder motorr. With new encoder … read more, Shop 2004 Chevrolet Silverado 1500 vehicles for sale at Cars.com. Research, compare, and save listings, or contact sellers directly from 53 2004 Silverado 1500 models nationwide., IF THIS VIDEO HELPED YOU SMASH THAT SUBSCRIBE BUTTON!-- UPDATE 3/22/2024 --1,000,000 VIEWS! Thank you everyone for the support!— UPDATE 3/12/2018 —Holy crap ..., May 31, 2023 · 1029 posts · Joined 2016. #6 · May 31, 2023. Read this somewhere when mine was stuck in 4-Lo a few years back. Fuse-pull reset to wake up the transfer case control module: Turn the engine on, pull the ATC Fuse out under the hood, wait 30 seconds, re-insert fuse, check for lights on the switch. Sometimes works, sometimes doesn't., Nov 21, 2017 · Service 4 Wheel Drive Message Diagnose and fix Service 4 Wheel Drive Message. GM has issued a service bulletin # 09-04-21-001 to address a Service 4 Wheel Drive Message condition on the vehicles listed below. In addition to the Service 4 Wheel Drive Message, you may also have a C0387 or a C0569 trouble code stored., If the transfer case is operated in 4HI or 4LO, it will behave as a Part-Time 4WD system. If it is operated in the Auto 4WD mode, it will behave like an on-demand AWD system. This transfer case uses a clutch pack to allow for a difference in speed between the front and rear axles in the Auto-4WD mode. In the 4HI or 4LO modes, there is no ..., 37 posts · Joined 2010. #1 · May 6, 2015. Hello, i have a 2005 z71 silverado that has a 4wd service light. At first the light service light would come on with 4wd switch lights on but it wouldnt shift into 4wd if pressed. Then i would restart truck and it seemed like with a bump the service light would come up., 04 Silverado Service 4wd Light.pdf 04 Silverado Service 4wd Light Book Review: Unveiling the Power of Words In some sort of driven by information and connectivity, the ability of words has be evident than ever. They have the capacity to inspire, provoke, and ignite change. Such is the essence of the book 04 Silverado Service 4wd Light, a ..., This has happened to me two times because of my truck going dead over a voltage drain issue (my radio). If you have a service 4 wheel drive indication come u..., 1. Defective or malfunctioning transfer case motor: The transfer case motor is responsible for engaging and disengaging the 4WD system in the Silverado. If it becomes faulty or fails, the 4WD service light may illuminate. 2. Faulty 4WD control module: The 4WD control module is the electronic component that controls the operation of the 4WD system. If there is a problem with the module, it may ..., On a high traction surface, the higher traction levels will create more binding and noise in the driveline. As a result, a small amount of noise or feel of the system operating can be expected when using 4HI or 4LO in Part-Time or Automatic systems, or 4HI Lock or 4LO Lock on Full-time 4WD., 33 posts · Joined 2019. #1 · Jun 5, 2019. I'm the proud owner of a 2019 ZR2 with less than 1700 miles on it, all in 2WD. The very first time I tried to use 4WD off road, I got stuck in a shallow mud puddle. Like anyone I put the truck in 4WD and expected to power right out, instead I got the dreaded "Service 4WD" message., Shop 2004 Chevrolet Silverado 2500 vehicles for sale at Cars.com. Research, compare, and save listings, or contact sellers directly from 46 2004 Silverado 2500 models nationwide., My truck is a 2003 Silverado 2500HD 4x4 Crew cab 6.0 litre engine 4L80-E transmission ... Along with the Service 4wd message, when I shift into 4wd it sounds like it is having a hard time doing it. All kinds of clanking noises. After it switches to 4hi or 4lo, it works good. When I put it into 4x I make, I recently bought an 04 Lb7, Vin code 1 with 146k. The "Service Brake System" light would come on intermittently, but would go away after a few engine start ups. Brakes still worked, ABS still worked, 4wd still worked, no big deal. Now however, the Service 4wd light comes on, the ABS light, and the Parking brake light all come on., Silverado 1500 RST Crew Cab Short Bed 4WD. $42,855. Excellent Price. 33k mi. 47 mi away. Menu. Add to favorites Share Quick view See actual pricing. Used 2021 Mazda. …, No movement from front but the 4wd light is solid with service 4wd light on. I tried set it back to 2wd which it does after 2wd flashes then goes solid. ... Chevy Silverado and GMC Sierra Forum. 1.4M posts 183K members Since 2009 A forum community dedicated to Chevrolet Silverado and GMC Sierra pickup owners and enthusiasts. Come join the ..., Only issue is the service 4 wheel drive light in dic.& 4 wheel drive does not work. My truck is a LMM. They used a GMLAN low speed and high speed bus. You newer one should be a CAN bus. Next time you see the message check to see if you can change settings on your climate control, turn signals work and door lock and window open., The Service 4WD light is most likely the 4WD switch on the dashboard. If the lights are acting funny then the switch needs to be replaced. ... Used Chevrolet Silverado 1500. 4,322 Great Deals out of 130,698 listings starting at $1,800. Used Lincoln Navigator. 203 Great Deals out of 8,519 listings starting at $1,300. Used Toyota Sequoia., Last week the message does not go away after restarting the car so I pull out the selector switch and resolder the joints then plug it back in to find that the "Service …, This article applies to the Chevrolet Silverado GMT800 (1999-2006). 4WD systems give truck owners unprecedented abilities when it comes to gaining traction, both on and off the road. But like most "upgrades," these systems also consist of numerous components, which over time will wear out and, Nov 27, 2021 ... a C0398 and c0364 and a Door issue on a 2014 Chevrolet Silverado ... services, or related graphics contained in ... 2024 Chevy Silverado EV Hands On ..., Service 4 Wheel Drive Message Diagnose and fix Service 4 Wheel Drive Message. GM has issued a service bulletin # 09-04-21-001 to address a Service 4 Wheel Drive Message condition on the vehicles listed below. In addition to the Service 4 Wheel Drive Message, you may also have a C0387 or a C0569 trouble code stored., Doing my best to explain this: 4wd functions when the truck is started. I can get it in 4, drive around without issues. Then when I take it out of 4wd it says "service 4wd" after coming out of it. It won't go into anything but 2 HI unless the truck is shut off for a few mins, then it will function perfectly fine again., Feb 13, 2023 · 3 posts · Joined 2020. #1 · Feb 13, 2023. I have had the Service 4WD message on my 2009 Silverado LTZ for the last year on and off. I have had it into the shop several times and replaced the encoder motor, front actuator, cleaned up the ground wire, traced most of the wire and still no joy. The TCCM will throw a "C0379-01 Front axle system ..., 2004 Chevy Silverado z71 ( service 4wd message The selector is not getting or no lights on at lights all came on as I'm starting the vehicle the fuses are good there are two fuses that I checked one under the hood and one on the driver side fuse box what I did I replace the switch assembly for the 4 x 4 and I replaced the transfer case module and I cleaned the two wires on the frame of the ..., Turn the key to the Accessory position (not the run position, just Accessory) 3. SHIFT TRUCK GEAR SELECTOR INTO NEUTRAL (step I left out at first) 4. Turn 4WD selector switch all the way past 4LO into the N position and hold in N for 30-45 secs., 2007.5 Silverado: Banks intake & exhaust, Quadzilla stealth II. Save Share. Like. ... #02-04-21-006D - (Mar 24, 2004) Inoperative 4WD/AWD Lamps, Inoperative 4WD/AWD System (Reprogram Transfer ... they stick in 4wd when it the service 4wd light comes on. one last night was stuck in 4wd and has a clunk in the driver's side cv shaft area(not bad ..., A couple of days ago I drove about 10 miles on snowy roads. I was in 4 Hi with max speed of 35-40 mph. I didn't notice any problems at the time with the 4WD. The next time I went to use the truck, it won't move in any gear (R, D, 1st). There is a message that reads Service 4 Wheel Drive. My truck has the dial selector switch for 2 Hi, 4 Hi and ..., 2008 Silverado Service 4wd Message. Hey Guys, I have a 2008 Silverado with about 170K kms on it and just yesterday the Service 4wd message popped up on my dash. I was in the drive through to grab a coffee when the message randomly showed up. The selector switch was in 2wd and has been for a few weeks. The selector switch is still …, Step 1 - Check differential code. For the 96-06 Silverado's, the factory limited slip differential will have a code of G80. The RPO code should be listed inside the glove box. If you purchased the truck used or can't find the code, proceed to Step 2 for another form of testing. Figure 3.