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Prev Professional Automotive Repair Technical Discussions for October 16, 2012
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Open Help Requests for GM
Help Request Answers
2006 Buick Rendezvous CXL 3.5L Stall, No Crank VIN: 3G5DA03L56
I have this Buick that stalls intermittently, like turning the key off. Can happen at speed, coming to a stop or just idling in Park. Happens 1-4 times on a 15 minute trip or sometimes not at all. What makes it unusual is that the vehicle will not crank for an...
1999 Chevrolet K3500 7.4L No Start VIN: 1GBJK34J7X
Thanks in advance for any help. Truck was towed in(from another shop) for a no start condition after a back fire. No codes, found I had no fire at plugs and replaced cap and rotor. Now I have fire but still no start. Checked fuel pressure and it was low (40psi...
2003 Chevrolet Trailblazer EXT North Face 5.3L Lbeam headlamps VIN: 1GNET16P63
From the archives everyone is mentioning the headlamp control module; however, I can't find this module. Alldata and Mitchell both say it is located on or around the left side rear PDC, but there are no modules there. It lists three different relays attached t...
2004 Chevrolet Silverado 2500 HD LT 6.6L Excessive Emissions, Misfire
Hi. This duramax had a tuner (bullydog) and is overfueling off idle, knocking at idle sometimes and misses on number 7 at idle.. I recently repaired two injector connectors that were a little burnt on cyl 2 and 6. now it runs better at idle. Cylinder #1 has a ...
2004 Chevrolet Express 3500 6.0L not tps signal VIN: 1GCHG39U74
I have a 2004 chevy express g3500 with a 6.0l. W/O says transs slips and customer barely made it to shop. No codes. I went this morning to check out van. Check trans fluid level good, it has a burn smell normal wear. Test drove van it drove fine no slips. Know...
2006 Chevrolet Impala LT 3.5L Hesitation VIN: 2G1WT58K26
thanks in advance.. this car came in with complaint for shift probleme. after driving noticed lack of power at around 1500 to 2000 rpm. once you get passed that its much better, almost seems no response at throtle,i jumped on checking exhaust restricted but ga...
2001 GMC Savana 2500 5.0L Daytime running lights VIN: 1GTFG25M31
As usual, another headache here that needs lots of asprin. The van came in for inspection an emissions. Emissions came up "not ready". After talking to customer they mentioned some jump starting going on the past while because the daytime running lights stayin...
2008 GMC W3500 Forward W3S042 6.0L MIL Lamp on
Hello all and thank you in advance for any help. This truck has been in for these same problems once before. The customer had it at a dealer in Joliet and they declined replacement of the MAF sensor. I have checked Cat. back pressure and it was less than 2 psi... Trouble codes: P0172 (Fuel Trim System Rich Bank 1), P0430 (Catalyst System Low Efficiency Bank 2)

Fixes & Summaries for GM
Fix/Summary Answers
1991 Chevrolet Corvette 5.7L Poor Idle Quality VIN: 1G1YY338XM
Hi all sorry to report that the customer is MIA at the moment and has not been back yet. So I am closing this fix and hoping that if he does come back I will post the final repairs. Thank you so much for all your input. Keep fixin'
1999 Chevrolet Express 3500 6.5L Instrument cluster VIN: 1GCHG35F9X
Ok, first off sorry for the late closing on this vehicle help request post. I have been working on this for weeks now and have spent over 50 hours of total time. I had checked wiring, removed and replaced, pcm, buffer module, cluster, and ran new wiring betwee...
2008 Chevrolet Silverado 1500 LT 5.3L Ebcm VIN: 2GCEK13318
This vehicle may be fixed. I performed a reprogram on the EBCM to see if the problem goes away. SAS gives good counts, no accidents on this vehicle and alignment is good. Lots of advice said to reprogram before replacing a module so that's where I'm at. I say ...
1997 Pontiac Firebird 3.8L fuel level / gauge VIN: 2G2FS22K3V
Hopefully this will help someone in the future. We knew we did something wrong and it was obvious once we removed the fuel pump assembly what we had done. We routed one of the hoses [the one with the corrugated cover] incorrectly and it contacted the float arm...
2007 Pontiac G5 GT 2.4L Unknown VIN: 1G2AN18B57
Thanks for the help guys. I propaned the intake with no results. I tried to duplicate on lift but traction control takes over. found a small hole in the flex pipe of the converter where it meets manifold. when engine is loaded while getting on the gas the engi...
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