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Prev Professional Automotive Repair Technical Discussions for December 8, 2012
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Open Help Requests for GM
Help Request Answers
2005 Cadillac Escalade 6.0L Engine VIN: 3GYEK62N05
When this vehicle is started up , as it is shifted into gear, a noise is heard from the engine for about 5 seconds which sounds like pre-detonation (diesel sound), and is corrected almost within 3 seconds. after that there is a resonant vibration running right...
1994 Chevrolet S10 LS 4.3L No Start VIN: 1GCDT19W8R
This vehicle is able to be started when cold, using starting fluid in the morning. Once the vehicle is at normal operating temperature, it starts normally according to the owner. I have verified these conditions myself having had the vehicle in my shop for a c...

Fixes & Summaries for GM
Fix/Summary Answers
2001 Chevrolet Tahoe 5.3L Prndl VIN: 1GNEK13T81
Thanks for all the replies. Long story short, it appears to be the instrument panel. I replaced the prndl switch again, this time deburring the shaft. I forced the first one on and as Robert mentioned, probably ruined it. Had I read the large print note in...
2003 GMC Sierra 2500 HD SLE 6.6L antitheft light is on VIN: 1GTHK23153
opened up the wire harness from the ign cyl to the bcm and found a three way crimped junction for ground... the one wire was broke at the crimp and touching intermitantly. repaired the wire and dtc cleared and system functions properly.
2004 GMC Sierra 1500 SLT 5.3L nocommunication VIN: 2GETK19T44
Thanks to all that responded, Timothy [...] it I found that the Data line was grounded under the drivers seat due to the movement of the seat chaffed the wires after unplugging the harnessat the rear of the seat all started to work. I previously unplugged and is...
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