My truck is out of warranty, but this is a pervasive problem that has existed since 2002 according to other Avalanche owners. When it does, the locks auto-lock, and the vehicle sets itself into Park. The dealer replaced the transmission at 16,000 miles. Axle and boot were replaced. I have this same problem, my 2004 avalanche had a big clunking noise and stopped working in drive.
It could also be something to do with the valve body. I could not get it to go faster than about 55 but that hurt to hear the strain. I was on the highway when this happened, traveling 50-55 mph when it occurred. My husband drove our vehicle backwards all the way home. Vehicle has only 30k miles. I got my Avalanche towed home that first night. It could also be that the linkage is broken.
Chevrolet has been developed sophisticated transmissions through years and it is critical that you add the exact type of transmission fluid stipulated by your owner's manual typically in the back of the manual in a section titled Fluid Capacities. Call around first, most transmission shop will test drive the vehicle with a Tech2 scanner to confirm this issue. The contact stated that the vehicle has been taken to the dealer repeatedly to have the air bag failure repaired. Thank you for using Fixya and keep us posted. This just may be a shift program problem, but what damage is being done to transmission over long term?.
Coasted to a stop onto shoulder, shifted into park, released foot brake, vehicle began to roll forward downhill , apparently because transfer case shifted into neutral. The first would be that the clutches that engage reverse have simply worn out. Went to dealership had trans flush, new fluid, and new filter. I have never towed anything except for a uhaul trailer once for about 250 miles. Look for other causes of the condition. I was pulling out of a parking lot and the transmission made a winding noise and wouldnt move the truck and then popped into gear long enough to get me about a half mile before quiting totally.
Drop the oil pan and if it has a lot of filings and metal it is time for a rebuild. This condition may be caused by the stator shaft 214 being non-concentric with the pump cover 215. The contact stated that his transmission failed while driving approximately 55 mph. If the condition remains unchanged, the condition will not be corrected with this procedure. The second will be slightly more technical. If you are having problems with the transmission in your Avalanche 1500, such as clunky shifting or hesitation, check the fluid level first - it is amazing how many drivers pay thousands of dollars for transmission work when a half quart of transmission fluid would have fixed the problem. Factory U-joints are sealed so was not able to be greased during regular maintenance.
How to tell if selenoid bad or ignition swith bad. Tighten Tighten the battery cable retainer to 17 N·m 13 lb ft. I have a 2002 Avalanche 1500 4x4 with this same problem. The first thing to do is get under the truck and see if the wiring harness is plugged in. They are a lot more common. What type of transmission fluid does a 2002 Avalanche use? What might this be My 2004 Avalanche started delaying in second gear but would eventually go to third.
I have been an auto tech for 38 years. I was able to coast to a stop on the shoulder of the highway without further incident, however I was almost rearended by following traffic the moment it happened because of the sudden decrease of speed without warning. Boots replaced 493548 km Rearend loudly whining. No dummy lights or messages on car. The dealer found the sprag broke and the clutches were burnt. My truck is out of warranty, but this is a pervasive problem that has existed since 2002 according to other avalanche owners.
I have also contact the federal trade commission. Just a simple plate kit would probably not provide. Slowed down to a stop on shoulder, turned off engine, restarted engine and shifted transmission into d, accelerated gradually and drove down highway and when accelerator pedal was released, transfer case shifted into neutral once again. If the transmission fluid level on your Avalanche 1500 is low, you need to add fluid through the dipstick tube. The 2002 Chevrolet Avalanche came with two automatic transmissions. The dealer also stated that the failure was caused by the transmission fluid releasing from the clutch pad which was normal. The standard transmission for these trucks was the 4L60E.
Using the proper terminal removal tool, remove the two or three wires from the 4-way connector. The transmission also needed to be repaired. No codes had code reader in glove box. Checked the panel and it was 2 wheel drive. For your model year there is a bulletin that describes this condition.