1991 GMC Sonoma Consumer Discussions

Chevy S10 - GMC S15 and Sonoma Electrical Problems

91 Sonoma Starting/Fuel/Voltage Issues

Written by: polander on Jul 03, 2008 07:34 PM

The daughters 1991 GMC Sonoma with a 2.8L V-6 died on the side of the road and was towed home. A friend of hers put in a spare battery he had, checked the fuel pump relay, said it was bad, wiggled it and the truck started. She bought a new battery, put a few miles on the vehicle that night, next day a few more miles then another tow home. She bought a new relay which I replaced ... Read More...

Chevy S10 - GMC S15 and Sonoma Climate Control

Re: heat not working [jhatch]

Written by: jsmothers on Dec 13, 2006 06:05 AM

I have 1991 GMC Sonoma. The blower is not working. I have already replaced the blower motor. Anyone know where the blower relay is??? Read More...

Chevy S10/GMC S15-Sonoma: Problems & Solutions

Sonoma heater core replacement question.

Written by: pbernard on Mar 28, 2005 02:14 PM

Hi, I have a 1991 GMC Sonoma, 4x4 with the 4.3L engine. When I bought the truck new, it did not have air-conditioning. The dealer had a after-market air-conditioner installed. I now need to replace the heater core, and do not know if I need the one that is for air-conditioned models or non air, as it was when I bought it. My question is: If a after-market air-conditioner ... Read More...