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Prev Professional Automotive Repair Technical Discussions for May 3, 2012
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Open Help Requests for GM
Help Request Answers
1971 Buick LeSabre 5.7L No Start VIN: 452391Y118
1971 buick lesabre 350.4 / customer complains that the car wont start after sitting for a day or two un less he pours gas down the carb, then it runs fine, no hesitation or stalling.I am not very familiar with carb. engines, has a mechanical fuel pump but no f...
1999 Buick LeSabre Custom 3.8L Poor Idle Quality, Hesitation, Surge, Cuts out, Stall, Poor Fuel Economy, MIL Lamp on VIN: 1G4HP52K7X
car came in as no start. found plugged cat. replaced cat. carf then started but stalled intermittant. found that tapping on maf caused a stall. replaced maf. care went away for 3 days. came back in then with a p0102. scoped maf - 0-50hz. checked 12v on pink an... Trouble codes: P0102
2001 Cadillac Seville STS 4.6L power windows VIN: 1G6KY54971
drivers door window works fine but the other 3 door windows won't work from any switch i try and also the power door locks won't work.is there a module for the windows and could that be bad.has anyone seen this problem before.thanks for any help i may recieve....
1999 Chevrolet Blazer 4.3L No Start VIN: 1GNCS13W4X
I drove the truck into the garage and replaced the blower motor. It required me to remove the ECM to gain access. When I put it back together, it wouldn't start. I did the 30 minute passlock relearn 10 times but no luck. I realized that I forgot to disconne...
2001 Chevrolet Malibu 3.1L No Start VIN: 1G1ND52J01
Hi, Car came in on the hook. Complaint ...no start... Started runs good...rpms shows up on scanner.. But not on tach in dash...24x shows 16000 about???... Any help in figuring this out or , what to test next would be appreciated.. Have a great eve. Thanks ... Trouble codes: P0336, P1189
2002 Chevrolet Trailblazer LT 4.2L MIL Lamp on, Won't accelerate
These 2 codes were in the system and wouldn't clear. Checked according to flow chart and it says the pedal position sensor is faulty. Replace sensor and problem still exists. When looking at pedal position sensor voltages one is at 4.96v and the other is at 5.... Trouble codes: P1271 (Excessive Difference between pedal position sensors), P1275 (Accelerator Pedal position sensor circuit 1)
2005 Chevrolet Equinox LS 3.4L Engin VIN: 2CNDL23F55
I have been working on this truck for a few years. Mostly pm / Wheel bearing E G R valve and tube. It came in and customer comp of noise from the E G R when cold. Started it this morning and i have lifter noise. Pulled the dip stick and i got chunks of some th...
1998 Oldsmobile Intrigue GL 3.8L Misfire VIN: 1G3WS52KXW
Well I have looked in the old records and it doesn't see any actual repair. So here it goes again. I have a consistant misfire on cyl #5 at idle only. raise the rpms to 1200 and it clears up. we have replaced spark plugs & wires, coil and ignition module no ch...
2002 Oldsmobile Bravada 4.2L No crank VIN: 1GHDT13S02
I have a passlock code i have tried a relearn procedure with no luck. Could i have a bcm problem?
2000 Pontiac Grand Prix SE 3.8L No Start, Stall VIN: 1G2WJ52K5Y
Ok driving us nuts, this grand prix has a very intermittant stall. Ive had it running for the past 50 mins with no problems. The codes listed were history and there are no "current" codes. We've tried an ignition module due to the symptoms. When it does finall... Trouble codes: P1626, P1629, P1811
2004 Pontiac Grand Am GT 3.4L High Cooling Fan VIN: 1G2NW12E54
Vehicle came in with a complaint of engine running hot, temperature guage indicating hotter than normal. Scanner shows 230 degrees f and no command for fan relay 2 or 3.I believe that GMs activate high fan at 226 degrees f. I am leaning toward a problem with F...

Fixes & Summaries for GM
Fix/Summary Answers
2006 Cadillac CTS 2.8L No Start VIN: 1G6DM57T96
1990 Chevrolet P30 7.4L hvac control head
We called alot of rv places that work on these vehicles but nobody had information or books on what control head was the correct number.we did not know if the control head that was in it was the very original one or if it was changed in the past since it is ov...
2006 Chevrolet Malibu LT 2.2L Brake Lights VIN: 1G1ZT51F16
First off thanks to those that replied. The PID in Tech2 only has one decimal place so when it is showing .8V it may or may not be within the programming criteria. I checked Vout with my Vantagepro and it was .83V. After physically adjusting the brake pi...
1991 GMC K3500 Sierra 6.2L transfer case
Hello Gentlemen, Many thanks to the two chaps that answered my request, I am going to remove and strip the planet set, I am sure that the sun gear thrust washer or bearing has failed, I will post what I find on the forum, thanks again and God Bless
2008 Pontiac G5 2.2L Surge, Stall, MIL Lamp on VIN: 1G2AL18F08
Thank You Techs for the help. The fix was a new PCM that we programed with our Tech 2 and TIS to Web, the car runs like new. Trouble codes: P0171 (Lean Bank 1), P0496 (Purge Soleniod Hi Flow).
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