Last reported case: 3 years ago
Based on 6 owner reports, 6 from forums)
What is C1500?
C1500 indicates a failure in the transfer case contact plate 'B' encoder circuit, which affects the 4WD/AWD system's ability to monitor or control the transfer case position. This is a medium-severity issue that can disable 4WD functionality and trigger warning lights, commonly reported in Chevrolet Silverado, Tahoe, and Suburban models. Based on real data, it typically triggers when the encoder circuit has electrical faults or sensor failures.
Common Causes:
- Electrical circuit faults in the transfer case encoder wiring or connectors (most common based on diagnostic patterns)
- Failed transfer case contact plate 'B' encoder sensor itself
- Corrosion or damage to wiring harnesses near the transfer case
Symptoms:
- 4WD/AWD system malfunction or failure to engage
- Warning lights on dashboard (often 4WD/service 4WD lights)
- Reduced traction in slippery conditions due to disabled 4WD
🚗C1500 on 2010 GMC Suburban
This page focuses specifically on C1500 issues reported by 2010 GMC Suburban owners. The experiences and fixes below are from real owners of this exact vehicle.
Symptoms Reported by 2010 GMC Suburban Owners:
Parts Often Involved:
What Owners Say
Real experiences from 2010 GMC Suburban owners
“And seeing that the shafts for the 95 and up are only about $60, is there any way I can make the 95 fit onto my 93 ? Or, if anyone has any ideas to free up my current shaft, that would help too.”View original
“My OEM steering shaft is seized inward, so after putting a new rag joint in I can't extend the steering shaft back in place. Ofcourse, the only steering shaft available for my 93 is around the $250 (USD) mark.”View original
“Also if it has been done, does the stock Suburban fuel pump and gauge sending unit work in that set up? In the photo,my plans are to move the air tanks and compressors and put the fuel tank in their place.”View original
“It has a reman engine with less 5k miles on it and the CEL is not on. I checked the transmission fluid and I had to add a little but it did not make any difference in the problem.”View original
“I've restored a 99 escalade console and have a set of 2004 buckets with all new leather covers ready for install. New carpet and new headliner material is ready for install.”View original
“I have 1999 C1500 Suburban with 5.7 and it is either hesitating or maybe the transmission is "hunting"? I can't really tell because it is pretty subtle but it is enough to be annoying.”View original
“I've restored the dash while it was out. I've restored a 99 escalade console and have a set of 2004 buckets with all new leather covers ready for install.”View original
“Has anyone installed a Suburban gas tank in between a set of 1991 C1500 Pick up frame rails? Also if it has been done, does the stock Suburban fuel pump and gauge sending unit work in that set up?”View original
“Hey guys, This happened this week and I just got to taking a picture and looking at it.”View original
“1994 Suburban C1500 Broken shock mount Hey guys, This happened this week and I just got to taking a picture and looking at it.”View original
These are real experiences shared by 2010 GMC Suburban owners on automotive forums and communities. Results may vary based on vehicle condition and repair quality.
About This Data
This page aggregates 6 discussions about C1500 from 2010 GMC Suburban owners across automotive communities.
Success rate (0%) is calculated from posts where owners confirmed whether their fix resolved the issue.
Last updated: 4/18/2022