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International Automotive Technicians Network
Prev Professional Automotive Repair Technical Discussions for July 18, 2006
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Open Help Requests for GM
Help Request Answers
1996 Buick Roadmaster Estate Wagon Collector's Edition 5.7L MIL Lamp on VIN: 1G4BR82P5T
Cust came w/check eng light on,tested code P1441 evap sys, purge during non-flow code.Removed purge flow on intake manifold and was open/normally closed.Installed new delco purge flow tested sys w/scanner could manually operate purge and watch 100% purge and i... Trouble codes: P1441 (Flow during non purge)
1997 Cadillac Eldorado 4.6L Magnsteer VIN: 1G6EL12Y2V
Hello fellow technicians. It was my privelege to be assigned to this vehicle upon my return to work from a back injury.Here s the story I got: The customer recently bought this used vehicle, and he brought it in with a "constant correction" complaint- he had t...
1997 Chevrolet Cavalier LS 2.2L Excessive Emissions, Poor Idle Quality, Misfire, Poor Fuel Economy, MIL Lamp on VIN: 1G1JF5243V
This car is over fueling. It is loading up so bad that it will miss at idle. The o-2 stays at .9 most of the time untill the short term get to about -34%. Then it tries to switch rich- lean. This car has no test port for fuel presure test. I thought it was lea... Trouble codes: P0172, P0300
2001 Chevrolet S10 2.2L no communication VIN: 1GCCS145X1
bcm and pcm issuing corrupt serial data. unplug bcm and communication is recoverd, but still get false data from pcm to speedo "making needle jump around" checked serial datalines in harness-ok, replaced pcm and bcm and still the same problem. what inputs to t...
2003 Chevrolet Venture LS 3.4L lifter VIN: 1GNDX03E13
In the glad it's not my car department...Van came in Dignoised misfire in #2 hole. No compression. Pulled valve cover and found rocker assm laying on head. The mounting stud pulled out of the head. I know that the most likly fix is to Heli coil and repair. I'm...
2003 Chevrolet Impala 3.4L bcm VIN: 2G1WF52E43
Thanks for taking the time to read this, I have this 03 Impala with a bad BCM, when it gets hot it goes nuts, lights flash, relays click and no start. According to Mitchell Repair the BCM has to be programmed with a Tech 2 when you put in a new one. Is this co...
2003 Chevrolet C4500 Kodiak C4C042 8.1L alternator VIN: 1GBC4E1EX3
checking if anyone has wiring diagram for charging system for this truck. e-mail to [...] any help would really be appreciated
1995 GMC K2500 Suburban 6.5L MIL Lamp on VIN: 1GKGK26F1S
suburban came in with complaint of lack of power and overheating only when towing. unable to duplicate concern, but have concerns on what i found and do not know if they would cause the cust. concern. first of all code 78 turned out to be a bad solonoid. when ... Trouble codes: 78 (wastgate solonoid)
1999 GMC Yukon Denali 5.7L Headlights VIN: 1GKEK13R9X
Hi Everybody, This Denali has no headlamps in the manual position but the DRL system works. When you switch to manual headlamps the running lights turn on but not the headlights. LT Blue wire from headlight switch has current upon activation, headlamp control...
2001 GMC Sierra 2500 HD SL 6.6L Radio & entire I/P except oil pressure gauge VIN: 1GTHK23111
Symptoms are intermittent - tach, speedo, odometer, radio, all I/P warning lights are inoperative. Oil pressure gauge reads normal. I hooked my scanner to the vehicle whicle malfunction was occurring and guel gauge reads 10% lower than actual, temp gauge reads...
1996 Pontiac Sunfire SE 2.2L theft detected
my dealer is hush hush about this problem i would just like some pointers on the most comen problems with these vehicals i am having a real hard time getting info about theft systems especially on the cavalier and sunfire the vehical starts for a few and shuts...
1999 Pontiac Sunfire SE 2.2L charging system VIN: 1G2JB5249X
vechile came in with the battery light on not a problem put an alternator in it charging system test was fine light out vechile left shop came back two days later with DRL light, charging system light, high beam light always on and hard starting. so once again...
2000 Pontiac Grand Prix GT 3.8L blower motor VIN: 1G2WP12K9Y
Vehicle brought in with blower motor not working. The motor, resistor and ignition switch have all been replaced. I tried using known good test parts to make sure everything that was replaced was indeed good. Still no luck. Tried adding extra ground to blower ...

Fixes & Summaries for GM
Fix/Summary Answers
1997 Buick Riviera 3.8L Air Distribution VIN: 1G4GD2211V
Thirteen replies all with the same advise...don't overlook the basics. Completed Evacuate/recharge this morning and cured the problem. Thanks to each and everyone for taking the time and effort to share your expertise & experience I had read only one reply b...
2002 Buick Rendezvous CX 3.4L flickering check engine light VIN: 3G5DA03E12
found a voltage drop in the ignition switch. Installed new switch & problem was fixed.
1993 Chevrolet G20 Sportvan 5.7L Hesitation, Stall VIN: DJFGGUURUG
Hey guys it turned out to be the hise inside the gas tank it had acrack in it.I went ahead and put a new fuel pump in it one time.Thanks guys good info.
1994 Chevrolet S10 4.3L tint VIN: 1GCDT14Z7R
Thanks all for the great advice. I will replace all the tint.
2000 Chevrolet Impala 3.4L electric VIN: 2G1WF52E0Y
I never had the idea of using the radio. Thanks for so many detail information of great guys. I sucessfully reset using the radio. Anyway, it is amazing that they did not reset although the customer dropped by a GM dealership sometimes for changing oil. Have a...
2001 Chevrolet Cavalier LS 2.4L compressor VIN: 1G1JF52T61
thanks for all the help guys , i can't believe i forgot to check the condensor fans, almost all the replys were right. the condensor fan was not working, and was causing press. build up and blowoff. further diag found creative engineering from a previous attem...
2004 Chevrolet Silverado 3500 LS 6.6L Fuel guage VIN: 1GBJC34214
Well, we will call this a fix. William [...] had a good point. If you fill this vehicle with the key on, it will set a false code and zero out the fuel gauge. Since this is a fleet vehicle, a number of people fill it. We put out a bullitin to make sure the ...
1989 Oldsmobile Delta 88 Royale 3.8L Front pads VIN: 1G3HY54C5R
Ok gang, finally got this vehicle back in the shop, it seems he just could not live with out it, until he drove it so far the caliper pistons were leaking from overextension. Here is the horrific part, since the brake fluid was leaking and he was low on cash h...
1993 Oldsmobile 98 Regency Elite 3.8L MIL Lamp on VIN: 1G3CW53LXP
Great news guys this car had a chewed wire and one broken wire at the canister purge selonoid!!! So the computer actually was seeing an open circuit and setting this code. It is fixed and now the scanner shows LO instead of HI for Quad Driver A and the light s... Trouble codes: 26 (Quad Driver Module Fault).
2000 Pontiac Bonneville SE 3.8L Passenger side under dash VIN: 1G2HX54K64
Thanks to all the responded. The fix for this vehicle was the cabin air filter was missing. Without the cabin air filter and bracket that hold it, the water poured in. With some help form a GM tech we were told to cut a peice of plastic about the size of a lic...
2001 Pontiac Grand Prix SE 3.8L Speedo VIN: 1GZWP52KX1
The fix is in... Thanks to those who took time from their day to help, We tried unplugging radio and controllers disconnecting battery all the tricks no go I tested input from controller to speedo a that curcuit was good. What finally convinced me was the fact...
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