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Prev Professional Automotive Repair Technical Discussions for November 13, 2009
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Open Help Requests for GM
Help Request Answers
1999 Cadillac DeVille 4.6L over heating VIN: 1G6KS54Y2X
Need help this car came from the auction and is over heating the fans are working and at idle in the shop it is around half way on the gauge. But when I drive the car it jumps to hot very fast if I pressure test it holds pressure with no leaks or loss of fluid...
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1993 Chevrolet Caprice Classic 5.0L Excessive Emissions VIN: 1G1BL53EXP
This Chevy came in for a smog inspection and failed as a gross polluter. I made the repairs listed and confirmed that emissions were good. I had to send the car to a Gold Shield station for certification after repairs and it failed again. I have tried to figur...
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1997 Chevrolet Blazer LS 4.3L Hesitation, Cuts out VIN: 1GNDT13W0V
Hmm, need some help here guys- got a drivability problem that seems unusuial. When cold first up in the morning- vehicle hesitates when leaving a stop light on a light acceleration. If i accelerate hard it will not do it. Once the vehicle is completley warmed ... Trouble codes: P0300 (random misfire- in fail since cleard menu on genisis scanner)
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1997 Chevrolet K1500 Silverado 5.7L EPC solenoid VIN: 2GECK19R7V
Hi, folks. After sending out this valve body for TCC and isolator valve reaming and repair (had code 1870 and worn bores), I reinstalled the valve body. The valve body rebuilder also said he did something to the AFL valve, but the bill is unclear as to what. I...
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1998 Chevrolet Trans Sport 3.4L Hesitation, Cuts out VIN: 1GNDX03E7W
I have this new problem, the Van is ok to drive but when the rpm comes up to 3500-4000it has no more power, Also standing parked and reving the engine it goes up to 3500 and then down up down up again. No codes, and i am visiting a friend so I have limited too...
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1998 Chevrolet Astro 4.3L Starting VIN: 1GCDM19W6W
hi we have a 1998 chevy astro van with intermittent no start.we check for codes found dtc p1631 we test for that code and are unable to find the cause of the intermittent starting problem.it happen most of the time in the morring we try it 5 times and just cra...
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1999 Chevrolet C3500 6.5L Bosch Hydro-Boost brake assembly VIN: 1GBJC34F6X
WOULD LIKE TO ASK SOME ONE IF THEY CAN SEND ME A DETAIL BRAKEDOWN ON THE HYDRO BOOSTER . MINE IS JUST LEAKING OIL BUT WORKS GREAT. BEFORE I TEAR IT DOWN I WOULD LIKE TO SEE A DIAGRAM. IF ANY ONE CAN SEND ME A BREAK DOWN I WOULD BE VERY GREATFULL PLEASE E-MAIL ...
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2002 Chevrolet Tahoe LT 5.3L Brakes VIN: 1GNEK13Z62
Hello GM masters. This well maintained Tahoe has had a recurring cold weather issue with the ABS. When cold, the system activates and driver control of the braking is taken away giving a low pedal and insufficient braking. Once the temperature comes up a bit t...
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2002 Chevrolet Silverado 3500 6.6L Won't Shut Off VIN: 1GBJK34132
This truck arrived 1 month ago with batt cables VERY loose and a failed ECM. Symptoms at that time were numerous, including what it has returned for: Won't shut down with the key. Truck has been fine for a month but now intermittently won't shut down. Cust has... Trouble codes: P0540 (Intake Htr Feedback Ckt), U1041 (Lost EBCM Communication), P0562 (Low Sys Voltage), P0880 (Undefined), U1096 (Lost IPC Communication), B1367 (Ign 0 Device Low)
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2002 Chevrolet Impala 3.4L ignition switch VIN: 2G1WF52E42
thank you all for your help car was towed in key would not turn; Had to drill out tumblers as I've done before got cylinder out ignition switch would not turn either put new switch and key tumbler in preformed relearn procedure security stops flashing & stays ...
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2002 Chevrolet Silverado 2500 HD 6.6L waterpump VIN: 1GCHK23112
we changed the waterpump on this truck last week and today customer brought back saying he hears a noise above 2000 rpm that wasn't there before. I can't hear anything on test drive but can in shop with the hood open. With a stethescope on waterpump housing yo...
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2002 Chevrolet Malibu 3.1L No Start VIN: 1G1ND52J22
have 2002 chevrolet malibu with 33000 miles, has extended crank.found code po141 and code u1040,checked fuel pressure ok,has good spark,did find that injector are not firing when problem is acurring.no bcm codes,no security light flashing,and security codes.ha... Trouble codes: P0141, U1040
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2004 Chevrolet Silverado 2500 HD 6.6L MIL Lamp on VIN: 1GCHK23194
this thing smokes bad, black and blue smoke (blue like oil) has EGR performance codes P0404 open position performance and code p1404 closed position performance. Going to start trouble tree but if anyone could point in the right direction let me know, thanks. Trouble codes: P0404 (egr open position performance), P1404 (egr closed position performance)
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1994 GMC K1500 Sierra SL 5.7L 1-2 shift VIN: 1GTEK19K2R
Owner complained of no shifting happening. I checked the fluid level & condition and all seemed well. I scan the computer and no codes found. I ckd the solenoids on the scanner and they all seem to working according to the chart in Mitchell. On a road test the...
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1996 GMC C1500 Sierra SLE 5.0L Excessive Emissions, Poor Idle Quality, Misfire, Poor Fuel Economy VIN: 1GTEC14M7T
We have cyl #7 with gas pouring into it.The plug will get soaked in two minutes and start missing bad.Compression is good,leak down test ok.We replaced the injector spider thinking that the injector was bad but we have the same thing.I was wondering if anybody...
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1996 Pontiac Grand Am SE 2.4L No Start VIN: 1G2NE52T3T
Hi to everyone. I checked history on IATN, but cannot find anything like this. Testing showed bad pcm.I replaced pcm with a used one.Vehicle started, but has warning lights on. Check engine light, security light, battery light. Also the engine cooling fan runs... Trouble codes: P1629
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2001 Pontiac Aztek 3.4L Information display VIN: 3G7DA03E01
Security and battery light are flashing. Vehcicle starts and runs fine. All we did was replace battery. Guages were not working. Did reset. They work now but lights still flashing. Tried Passkey reset. Security light does not go out or go on steady after 10...
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Fixes & Summaries for GM
Fix/Summary Answers
1988 Buick Regal Custom 2.8L No Start VIN: 2G4WB14W8J
sorry could have sworn i closed this already, anyway problem wound up being two fold, 1 programming in modis showing the high rpms while engine not running. 2 had 2 injectors shorted on front bank causing quad driver to shut down. replaced two injectors and ca...
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1998 Cadillac DeVille 4.6L fuel gauge VIN: 1G6KD54Y8W
Thanks guys and gals, who responded. You did get me thinking that there may be two different problems going on here with this caddy. The customer decided to come and get the car before we could chase a bad ground problem etc.we were headed in that direction......
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2001 Chevrolet Silverado 2500 HD 6.0L temp door actuator VIN: 1GCHK23U21
Thanks to everyone for helping me fix this one. Replace climate control again did the battery resetting and now seem to be fix. Thanks.
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2001 Chevrolet Camaro Z28 SS 5.7L p/s pump VIN: 2G1FP22G01
thanks to all who replied. can't believe this one. before putting on 3rd rebuilt p/s pump from parts store, decided to put on known good used pump and amazing, all is quiet, unbelievable. thanks again
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2002 Chevrolet Silverado 2500 HD LT 8.1L shifting VIN: 1GCHK29G12
I took all the inputs and checked the solenoids like Jerry & Chris suggested. I replaced the B trim solenoid as stated in the update and gave it a road test. Joe hit it on the nose about clearing the code. Went into generic mode and all is cleared. No history ...
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1995 GMC Jimmy 4.3L No Start, Cuts out VIN: 1GKCS13W2S
THANK YOU GUYS FOR YOUR INSIGHT. FOUND INJECTOR CONNECTOR IN INTAKE LOOSE. REPLACED PIGTAIL AND SOLVED PROBLEM./ ONCE AGAIN THANK YOU GUYS STEVE
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2005 GMC Yukon Denali XL 6.0L MIL Lamp on VIN: 1GKFK66U75
after hours spent with visual inspection solenoid testing and endless hours of smoke testing in car and removing parts and smoke testing out of vehicle gas tank,canister we changed the purge solenoid ran an evap test now P0455 large leak code is gone but weve ... Trouble codes: P0455 (large leak detected).
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1986 Pontiac Fiero SE 2.5L Rear Brakes VIN: 1G2PE37R7G
Thanks for all the replies. I'm in agreement with most of the replies. These rear brakes are a poor design and a technician can only make it work as well as its design allows. I took the car to another shop down the road. He said this is as good as they get. I...
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