Question about GMC Sierra 1500
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Posted on Jan 02, 2017
SOURCE: 1998 GMC SIErra
Check your transmission. Look underneath the truck and see if you see moisture around the transmission pan. If you see any indication of that, you may have a huge issue on your hands. Your reverse gear is seized to the Drive Gear. However hopefully it's something like needing a new clutch or a clutch adjustment
Posted on Aug 23, 2009
Likely suspects are a plugged fuel filter and/or a worn fuel pump. Replace the fuel filter first. Try a bottle of fuel system cleaner/water pick-up. If it still has problems, rent a fuel pressure gauge and read the engine-running pressure at the test port which is located on the fuel rail that is mounted just over the injectors. It looks very much like a tire valve with a screw-on cap. The pressure should be about 45 PSI. If much lower, replace the fuel pump. Hope this helps.
Posted on Sep 26, 2009
Check TPS for smooth and linear electrical response over the entire range of motion. If the response is jumpy or erratic at all, replace TPS.
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Posted on May 11, 2010
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