1992 GMC Suburban Problems: 1 Issues Every Owner Should Know
1992 model year · 0+ owner reports · Updated April 2026
According to Au7o's analysis of 0+ owner reports, the 1992 GMC Suburban has 1 documented known issues. No issues are rated critical, indicating generally reliable ownership. Across all issues, repair costs range from $150 to $600. DIY maintenance guides at au7o.io.
All 1 Known Issues
On the 1992-1999 GMC Suburban, the rear heating and A/C system suffers from blower motor failure and rear heater core leaks. The rear heater core is located under the rear cargo area and is susceptible to coolant corrosion.
Common Symptoms
- No heat or A/C in rear
- Coolant smell in cargo area
- Wet carpet in rear
- Rear blower motor doesn't work
How to Fix
Replace rear blower motor (VDO PM3542) and/or rear heater core. The rear heater core requires removal of rear cargo panels for access. Flush the cooling system and use proper coolant mix to prevent future corrosion.
What Owners Are Using
Parts and tips from 0+ owners who fixed this issue
- UpgradeTYC blower motor — direct replacement for HVAC fan (TYC Blower Motor)
- UpgradeWix cabin air filter — filters dust, pollen, and odors (Wix Cabin Air Filter)