Question about GMC Cars & Trucks
The rpm will just go higher. Reverse ,1st and 2nd seem to work fine. What would cause this problem? Should I get it flushed and serviced ?
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Posted on Jan 02, 2017
1st thing to do is test the system for codes, the problem is most likely a failed or stuck shift solenoid indside the trans, have you ever serviced the trans, sometimes a fluid and filter cahnge will cure these kinds of issues.
Posted on Nov 02, 2008
Check both O2 sensor(s) and catalytic coverter.. P0420 means catalyst below threshold. Also check the sensor at the transmission and solenoid.
Posted on Feb 06, 2009
What you need to check is the transmission release bearing because if there is a clearance on the release bearing you will encounter this problem and also check the transmission oil.
Posted on Jun 08, 2009
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