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Prev Professional Automotive Repair Technical Discussions for September 29, 2012
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Open Help Requests for GM
Help Request Answers
2005 Cadillac CTS 3.6L HAVAC floor vents VIN: 1G6DP56735
Hello GM techs, this 05 Cadillac CTS makes a ticking noise inside the Heater box cold only. I am pretty sure it's one of the servos.I have been listening with the stethoscope, and the noise is the loudest close to the radio than the firewall. If I change the f...
1991 Chevrolet Corvette 5.7L Poor Idle Quality VIN: 1G1YY338XM
Hi Techs. I have this 91 Corvette with the 5.7 multipoint injection. It has a stumble at idle randomly. It acts like a missfire. It idles fiarly good but every couple of seconds it stumbles and then recovers. It needed a tune badly so I did one complete with n...
1996 Chevrolet C3500 Cheyenne 6.5L No Start, Poor Idle Quality, Cuts out, Stall VIN: 1GCGC34F9T
this vehicle was just bought by my son, and I am not a diesel guy by far, so I am kinda lost on this one! it has a problem with stalling, mostly hot-.. it has some kind of what looks like an aftermarket module on top of motor [labeled ''STANADYNE''] THAT seems... Trouble codes: P0251, P0370, P1216, P1218
2001 Chevrolet Impala LS 3.8L Cooling fans VIN: 2G1WH55K11
This car has an intermittent cooling fan operation. It was driven in overheating. I can manually control the fans with my scan tool and cut them on. I replaced the ECT and it worked fine. Customer drove it a few days and it overheated again and at the same tim...
2006 Hummer H3 3.5L Poor Idle Quality, Misfire, MIL Lamp on VIN: 5GTDN13636
I am having trouble finding a definitive answer to why this vehicle has a misfire on cyl #2 at an idle. The code I have is for a random misfire but watching it on the modis shows cyl #2 missing all the time at an idle. I swapped the ignition coils, swapped the... Trouble codes: P0300, P0128

Fixes & Summaries for GM
Fix/Summary Answers
1990 Buick Regal Limited 3.1L No Start, Stall VIN: 2G4WD14T4L
Well, this one seems to be a fix. Thanks for all the advice on the fuel injectors on this car. It seems that when one injector fails, it causes the pcm to shut down injector pulse to them all. By the way, Mitchell says something similar but says that an inject...
1996 Buick Roadmaster Collector's Edition 5.7L Poor Idle Quality, Misfire VIN: 1G4BN52P3T
Customer declined further testing. If/when problem worsens, vehicle will return for compression and leak down test. I will also borrow a boroscope and try to get a view on the intake/exhaust valves. The harmonic balancer seemed to be ok. Thanks for all the hel...
2005 Buick LeSabre Limited 3.8L auto climate controls VIN: 1G4HR54K15
Well this will teach me not to skip the basics. Had tried the vent motor relearns(twice) checking for codes ect.. but got caught up in the whizz bang scanners and electronic didn't check basics. As many of you pointed out the charge was a little low(added 5 ...
2001 Chevrolet Silverado 1500 5.3L power steering pump VIN: 2GCEK19T41
First of all thanks for the many great replies. Some of you have had similar experiences to mine. Multiple pumps with no easy resolution. Well I think we can put this one to rest. The bottom line to this problem appears to be a contamination issue. What was ...
1988 Oldsmobile Cutlass Supreme SL 2.8L Hesitation, Surge, Stall VIN: 1G3WS14W0J
Ok, first I want to thank everyone for your response. I pulled the upper manifold and checked resistance on all injectors. Found # 1 and 4 to be low. Replaced them and all is well. Thanks again for your help! Trouble codes: 33 (34 -), 34 (44 -), 44 (64 -), 64 (testing and results).
2008 Pontiac Grand Prix 3.8L Stall, no starter VIN: 2G2WP55238
installed replacement pcm,had another local shop reflash and all is well.test drove a few days and worked great.thanks to all evan the gentleman that replied in spanish,dont know what he said, but thanks for the thought.
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