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International Automotive Technicians Network
Prev Professional Automotive Repair Technical Discussions for September 30, 2013
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Open Help Requests for GM
Help Request Answers
2005 Buick LaCrosse CX 3.8L line pressure VIN: 2G4WC53285
this is for my trans rebuilder. this car came in originally for slipping/bad trans. Rebuilt trans sent on way all seemed good. customer took a long road trip came back harsh shift complaint. examination shows trans bad inside rebuilt again. now exstended and h...
1997 Cadillac DeVille 4.6L Body Control Module VIN: 1G6KD52Y7V
Thanks in advance for any help on this one. Vehicle came in with a 1.6 amp draw. After isolating it to the BCM, we ordered one from GM and installed. Did not change the battery draw. In running thru tests, I noticed my BCM data on my Snap On scanner was showin...
1994 Chevrolet Camaro Z28 5.7L Lack of Power VIN: 2G1FP22P6R
Car arrived 6 months ago. Customer had just purchased private party and was told engine was fairly new. He was experiencing intermittent stalling while driving. We pulled car in and noticed engine seemed very hot and found low on antifreeze, gauge did not read...
1995 Chevrolet Astro CL 4.3L No Start VIN: 1GNDM19W4S
Hi, this van is not starting after repairs. It ran when the van came in. It originally came in for a charging problem and at that time it showed extended cranking problems. i made the comment it may have a fuel pressure regulato problem. It came back to have t...
2003 Chevrolet C6500 Kodiak C6C042 7.2L Lighting VIN: 1GBJ6E1CX3
This the other shops tow truck. They are asking that we now diagnose why no blinkers and hazards when vehicle running. After alot of checking, we found voltage on the ground wire for front head lights. This is creating a back feed of voltage into cluster and o...
2006 Chevrolet Aveo LS 1.6L Hesitation, Cuts out, MIL Lamp on, MIL flashing VIN: KL1TD66626
Vehicle came in with mil flashing, customer said ran ok, felt like misfire. Requested tuneup. Pulled ignition wires found spark plug tubes half full of oil. Code P2680-could not find a description on scan tool, IATN, AllDATA, or Google. Replaced plugs, wires, ... Trouble codes: P2680 (description unavailable), P0300, P0301, P0304
2007 Chevrolet Silverado 3500 Classic LT 6.6L p/s windows,d/s seat VIN: 1GCJC33D57
Ok guys i got a good one here,the SEO ACCY fuse blows and the R/frt and R/rear windows and the drivers seat quit working,did an amp draw it was ok,checked wiring diagram,this is where it got strange,the SEO ACCY fuse shows to only go to a mobile radio relay se...
2007 Chevrolet Trailblazer LT 4.2L temp. control VIN: 1GNDT13S07
During warm-up after t/stat r&r I found no heat from right side defrost vents. I shut the vehicle down for lunch, restarted it after lunch and found heat present at r.s. defrost outlets, hmm. Disclosed found issue to customer, he drove away only to return late...
2008 Chevrolet Impala LS 3.5L Misfire, Poor Fuel Economy VIN: 2G1WB58K08
this vehicle came in with no check engine light just a surge at idle. I checked codes and found a stored p0300. I checked the scan tool data and found a cylinder 4 misfire on a graph. Spark plugs had a large gap and burned up. I checked the spark and cylinder ... Trouble codes: P0300, P0304
2001 GMC Savana 2500 5.0L Hesitation, Misfire, MIL Lamp on VIN: 1GTFG25M71
engine new plugs coil ing module wires and fuel injection unit was towed in no start replace fi unit now running with po300 misfire we think its fuel pump not with in spec not sure.
2006 Pontiac Grand Prix GT 3.8L Heat VIN: 2G2WR58486
Vehicle came in for car not blowing hot air. We replaced the heater core and the thermostat. Vehicle left the shop blowing 120* out of the vents. Customer called back this morning saying it is cold again. Blend door seems to be working just fine.

Fixes & Summaries for GM
Fix/Summary Answers
2000 Buick Regal LS 3.8L No Start
The maf was the right call originally but while making the right call i made the wrong call as well. The new standard maf was what was making the car not start on a hot soak, i ended up getting a delco unit from the dealer, that was rebuilt...300 some odd $'s ... Trouble codes: P0440.
1998 Chevrolet C1500 Cheyenne 4.3L No Start, Cuts out, Stall VIN: 1GCEC14W3W
We have possibly fixed it. Sorry it took so long. WE had originally decided to change the pump, replaced with a Delphi unit, new filter and checked wiring. Truck started and ran, than stalled. Still had spark, good fuel pressure, but no start. Injector was f...
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