Question about 1995 GMC Sierra
Once I turn on my truck the check engine light comes on. Once its in drive it kicks into gear like a mule. It has a rough idle. Misfires. It has a high rpm at just idle and it revs about 5rpm constantly even while driving. I replaced the coolant sensor pigtail because I thought it has something to do with it. Now the light just stayed on. I'm positive I didnt cross the wires for it. I'm thinking it might be the MAP sensor or something electrical.
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Posted on Jan 02, 2017
Like to other guy said, give it a tuneup. Also try SEAFOAM to clean carb up of slug. Also check to make sure the butter fly for the choke has not come loose, causing it the choke it down. Failed choke pull-off.
Posted on Feb 02, 2009
If there is an Auto Zone or any other large auto parts store, have them scan the truck for the DTC codes. The DTC codes will identify the Issues that needs to be addressed in your engine and transmission that has set off the service engine light on. Once the issues has been resolved, the light will reset it self after the third start up and after 40 start up will erase it self from the history as long as there is no additional issues. Good luck and hope this helps, Shift suddenly become very hard. When going from park to either reverse or drive it slams into gear. 1-2 and 2-3 shifts are also harsh. All gears seems to work. Problem may be intermittent: Check TPS for smooth electrical response. If the response is jumpy or erratic at all, replace TPS.
Posted on Nov 11, 2009
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