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International Automotive Technicians Network
Prev Professional Automotive Repair Technical Discussions for September 15, 2010
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Open Help Requests for GM
Help Request Answers
1986 Chevrolet Corvette 5.7L Poor Idle Quality, Hesitation, Cuts out, MIL Lamp on VIN: 1G1YY0788G
Car came in not running. R & R engine then upon installation discovered no start / VATS issue . Now the car starts and drives but it is showing codes for mass air flow , burn off and service engine soon light is on . Car is running rough and rich . Tried repla... Trouble codes: 33 (mass air flow), 36 (mass air flow / burn off)
1994 Chevrolet K1500 Suburban 5.7L low power under load VIN: 1GKFK16K0R
origional complaint was lack of power or bogging when HOT. Truck had been tuned at another shop prior to comming here. We found the fuel filter almost plugged (175,[...]) We changed filter, fuel pump and strainer. Truck came back 2 days later same problem. ... Trouble codes: 44 (lean)
1998 Chevrolet Tahoe 5.7L Poor Idle Quality, Hesitation, Poor Fuel Economy, MIL Lamp on VIN: 1GNEK13R4W
When this vehicle idles it is missing shaking it then idles real low where also black smoke starts coming out of exhaust and sometimes even pops out of the exhaust i looked at the misfire counter and yesterday all cylinders were missing i found that the maf wa... Trouble codes: P0300
1999 Chevrolet C1500 Suburban 5.7L Misfire VIN: 3GNEC16RXX
Any help would would be great, vehicle came in with a p0300 and no.4 cyl showing misfires. Customer states mil only comes on during freeway driving over 70 mph and no misfire is felt. Drove vehicle and confirmed complaint, was able to set mil 3 times and freez... Trouble codes: P0300 (Random cyl misfire)
2009 Chevrolet Silverado 1500 LT 4.8L radio VIN: 2GCEK23C09
Factory radio displays (station and clock) are too dim to see in the daylight. Dealer states all 2009 trucks on his lot are the same, invisible display in the daylight? Another great design feature? Thanks.
2009 Chevrolet Express 3500 6.6L Static spark from engine VIN: 1GB6G3A69A
We have a fleet of '09 Champion Para-Transit buses utilizing cut-away Chevy Express chassis w/Duramax 6.6L diesel engines. On two of these vehicles, we are experiencing an intensive static discharge from the crankshaft pulley to the engine oil pan rail. Has an...
2001 Pontiac Grand Am SE 3.4L Passlock VIN: 2G1WF52E94
Hi guys have a customer has intermitten passlock trouble,rather than replacing the passlock and cylinder does anybody know how to bypass the system.ive done it once but cant remeber how.thanks in advance..
2006 Saturn Ion-2 2.2L MIL Lamp on VIN: 1G8AZ52F95
Hello all, This vehicle came in for the CEL coming on, no driveability complaints. Scanned for codes and found P0300 - misfire detected. Vehicle seemed to run fine with no obvious misfires. Took for a drive and ran fine the whole time. Checked scan data and fo... Trouble codes: P0300 (Misfire)

Fixes & Summaries for GM
Fix/Summary Answers
2003 Buick Park Avenue Ultra 3.8L engine VIN: 1G4CU54133
Unfortunately the customer expected me to assume responsability to track down this issue. We received several great replies. The overwhelming majority stated issues with the mounts and they should all be replaced with OE. It was also noted that they have issu...
1985 Chevrolet S10 2.5L No Start, Cuts out, Stall, Misfire VIN: 1GCCS14E2F
Well so far I have rechecked all the wiring that goes to and from distributor and ecm. Tried all the parts a second time to try and eliminate any bad parts still no luck. pulled timing cover to check gears no missing teeth marks dead on. getting ready to try a... Trouble codes: 42 (est problems).
2000 Chevrolet Silverado 1500 LT 5.3L Extended crank time VIN: 2GCEK19T3Y
Hey guys! Thank you all for the replies on this extended crank time on this 2000 K1500 Silverado. Richard from New York, Chris from Iowa and Dwayne from Michigan were right on the money on this one. I missed the fuel pressure regulator as the cause because I d...
2002 Chevrolet Silverado 1500 LS 5.3L door locks VIN: 2GCEC19J9T
Tried the suggestions made, it does appear that the BCM will have to be replaced. Thank you so much for your help.
2003 Chevrolet Silverado 1500 5.3L Front Axle Actuator and ABS Module VIN: 1GTEK291X3
I shouldn't have assumed all the others circuits powered by the ignition switch were working. After some more testing, I find the blower motor and cruise control are inop. All these wires are fed by an orange wire coming from the ign switch (just like Jerry f...
2003 Chevrolet Astro 4.3L no communication VIN: 1GNDM19X13
With all the replies it confirmed to me that the green wire was shorted to voltage as i suspected. With voltmeter hooked up I started to narrow down the circuit that was shorted into that wire. Ends up with the AUX.B wire in the underhood fuse box was the wire...
2004 Chevrolet Tahoe LS 4.8L MIL Lamp on VIN: 1GNEC13V64
did not fix this one. car manager wanted to send to dealer so we did they basic called back saying map sensor so we said go ahead but we have already been there. then they called back and said air flow meter and we said go ahead we have already been there stil... Trouble codes: P0101 (Maf sensor corulation).
2008 Chevrolet Express 3500 6.0L No Crank VIN: 1GBJK34K98
Thank you to all that responded to this no crank/no start problem. Customer has alerted Chevrolet and found he does have warranty left on the vehicle. Customer has asked us to stop working on the vehicle and we do not know what is causing the problem, howeve...
2003 Oldsmobile Alero GLS 3.4L all light in the front dont work VIN: 1G3NF52E93
Thank everyone sorry i guess i forgot to close this case but yes it is fixed thank to all of you that helped me what i found wrong was that it had some corrosion in the connect under the under hood fuse box and it was alittle loss.
2002 Pontiac Grand Am GT 3.4L Cooling Systems VIN: 1G2NW5ZES2
We made for sure the antifreeze was a 50/50 mix for the coolant part. Replaced cap and coolant tank with new oem. Looks like not building enough pressure was the problem. Problem solved and Thank You for your help. iATN is the best.
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