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Prev Professional Automotive Repair Technical Discussions for September 15, 2014
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Open Help Requests for GM
Help Request Answers
1992 Chevrolet Blazer Cheyenne 5.7L Hesitation, Cuts out, Stall VIN: 1GNEK18K6N
Vehicle came in with a misfire. Vehicle will idle and Rev fine. As soon as tog drop it into gear vehicle will not Rev or pull it's self. Customer has replaced all electrical components under hood. I've checked voltage fuel pressure timing. Everything appears t...
2006 Chevrolet Silverado 2500 HD LT 6.0L MIL Lamp on VIN: 1GCHK23U56
replace throttle body and pigtail.replaced throttle module.replaced data wires from pcm to throttle module.replace wires from throttle module to throttle body Trouble codes: U0107
2007 GMC Envoy SLE 4.2L Excessive Emissions, Poor Idle Quality, Misfire, MIL Lamp on VIN: 1GKDS13S27
Yesterday scanned, had a p0300 looked at misfire data using otc geneysis evo. Cyl. 4 & 5. Pulled both coils to watch spark #5 appeared weak yellow arc. When i replaced plugs all appeared darker than normal and #5 was fouled. The plugs were not that old gap was... Trouble codes: P0300 (Random misfire)
2007 GMC Acadia SLT 3.6L Camshaft sys VIN: 1GKER23767
We set the timing in correct order and code PO019 is gone but we can't get rid of PO341, we replaced cam sensor on bank 1 intake cam sensor and we still keep getting the same code, PO341. We appreciate any help.
2011 GMC Acadia Denali 3.6L Windshield Wipers VIN: 1GKKVTED7B
Hello. This Acadia will blow the wiper fuse intermittently, it has happened twice for the customer. The first time we put a fuse in it and checked the amp draw on the system and it was ok. A few weeks later it blew again but now, at times, when working the wip...

Fixes & Summaries for GM
Fix/Summary Answers
1998 Chevrolet S10 LS 2.2L No power VIN: 1GCCS1941W
Thanks for all the replies. Customer has had PCM reprogrammed and allthough truck still doesnts feel right to Me He seems satisfied. So case closed at this time. Troy
1994 Oldsmobile 88 Royale 3.8L Misfire VIN: 1G3HN52LXR
1st found customer had tried to diag himself ( we all know how that goes ) they had 2 spark plug wires wrong. after finding that found #1 plug wire was pulling down 1/4 coil. replaced wire and all is fine. thanks for all the reply's and help
2006 Pontiac G6 GT 3.5L Poor Idle Quality, Misfire, MIL Lamp on VIN: 1G2ZH558X6
Customers complaint was check engine light keeps coming on. P0300 was the code. Cylinder 2 was the cylinder that was misfiring the most. (Checking with a Tech2 misfire graph, at 1200 rpm in neutral.) At WOT I would get random misfires on the graph. Nothing ... Trouble codes: P0300.
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