The 1947 - Present Chevrolet & GMC Truck Message Board Network - View Single Post - 1991 GMC runs poorly after engine is warm

willymakeit · 01-13-2007, 01:30 AM

Okay..... finally had to post an update. YEEHAW! Finally found the wiring I was looking for! Whoever removed the O2 sensor had tucked the harness end up above the transmission out of sight. Cleaned the sucker up, added the 02 sensor and with my other repairs ....... everything is fine and dandy now!

Well now I have a brake problem. Boy when it rains it pours! LoL. Back drivers wheel started locking up so now I have to figure this out. Guess my first process will be replacing the shoes and the cylinder.

Anyway, I wanted to make sure I thanked EVERYONE for their input! I have to admit that his is the best place on the "net" to get some help! THANKS again!

01-13-2007, 01:30 AM	#17
willymakeit Registered User Join Date: Dec 2006 Location: kansas Posts: 7	Re: 1991 GMC runs poorly after engine is warm Okay..... finally had to post an update. YEEHAW! Finally found the wiring I was looking for! Whoever removed the O2 sensor had tucked the harness end up above the transmission out of sight. Cleaned the sucker up, added the 02 sensor and with my other repairs ....... everything is fine and dandy now! Well now I have a brake problem. Boy when it rains it pours! LoL. Back drivers wheel started locking up so now I have to figure this out. Guess my first process will be replacing the shoes and the cylinder. Anyway, I wanted to make sure I thanked EVERYONE for their input! I have to admit that his is the best place on the "net" to get some help! THANKS again!