1999 GMC Suburban 2500 Repair and Maintenance
A guide to problems, costs, maintenance and repair for your 1999 GMC Suburban 2500
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1999 GMC Suburban 2500 ProblemsCheck Engine Light With Code P1870
Vehicles equipped whit a 4 speed automatic transmission may develop a harsh 1-2 shift and/or illumination of the Check Engine Light with code P1870 stored. This can be caused by wear of the bore for the TCC isolator and regulator valves in the valve body. This condition does not commonly occur until the transmission reaches normal operating temperature. If the valve body is worn, replacement will be necessary to correct this concern.
One or more fuel injectors may become stuck closed causing an engine misfire and the Check Engine Light to illuminate. Our technicians tell us that this problem can be caused by some fuel additives. There are special procedures which may be able to restore the affected injector. If this fails the affected injector must be replaced.
The alternator may fail causing the battery to go dead, or an abnormal noise may develop. The dash warning light may or may not illuminate. A failed alternator will require replacement.
1999 GMC Suburban 2500 QuestionsWhy is the anti lock brake light on and the anti lock brakes don't work? (1 answer)
All the time.
I have had to prime my suburban for awhile now to get it to start then the other day I was driving and it just died on me. Had to have it towed back to my house. Was able to get it to start the next day and it idled fine but as soon as I put it in gear and tried to drive it died after about 15 fe...
Turns over although wont fully engage. Battery is 2 yrs old and starter is one year old.