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Prev Professional Automotive Repair Technical Discussions for June 26, 2007
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Open Help Requests for GM
Help Request Answers
2000 Buick Regal LS 3.8L No Start, Surge, Stall VIN: 2G4WB52K4Y
costomer complaint was a stalling on decel. when i went to start the car to bring it in the shop all the dash lights were flashing and car would crank over and the starter would kick in and out as the lights flash.If you turn on the head light switch the dash ...
2001 Buick LeSabre Limited 3.8L No Crank VIN: 1G4HR54K41
Thanks beforehand to all for taking the time to help. The customer has a problem with the car where at times the car will not crank but the battery is fine and all other accsories work fine. I scanned with a Tech 2 and we have 2 codes in the Theft Deterrent Co...
2004 Buick LeSabre Custom 3.8L Vehicle Theft Deterent VIN: 1G4HP52K34
Thanx for reading this. The customer said that occasionally the car seems to have a bad battery and will not start, just turn the key and nothing happens. Sometimes antitheft will activate and make the horn honk. Other times you turn the key and no lights come...
2003 Cadillac DeVille 4.6L pressure sensor VIN: 1G6KD54Y23
hello fellow techs, I have a customer that is requesting for me to relearn new tire pressure sensor locations into the pcm after a tire rotation. I have minimal experience working on this system with no tech 2 avaiable to me. is there a procedure I can use t...
1994 Chevrolet Beretta Z26 3.1L Cooling fan, Windshield Wipers, Radio. VIN: 1G1LW15M1R
About a month ago I had a problem with my ignition switch. I tried to turn the ignition on, but the switch would not turn. I wiggled the key for about a minute and the switch finally turned. When I drove that day, I noticed that my radio and wipers weren't wor...
1997 Chevrolet Tahoe LS 5.7L Poor Idle Quality, Misfire VIN: 1GNEK13R9V
Standard 350 with dart heads, all other equipment is factory. During cranking, it will backfire out the exhaust a few times before actually starting. Distributor is in correctly, camshaft offset at 0. When it does start, it will run fair, with a slight stumble...
1998 Chevrolet K1500 Cheyenne 5.0L Misfire, MIL Lamp on VIN: 2GCEK19M2W
truck misses at light load or pulling trailer under light load on #7 and #2 can duplicate it in 2nd gear at about 2000 rpm, all scan tool data is good not running lean or rich as far as i can tell with one cyl missing on each bank, fuel trim is at the most +6.... Trouble codes: P0300
2000 Chevrolet Monte Carlo SS 3.8L 4th VIN: 2G1WX12K9Y
this trans works great ther are no codes but it will not shift to 4th.solus scanner shows 4th comanded and the data shows 3rd changes to 4th but no rpm difference.i can hear shift solenoids working.the only thing on the scanner that puzzles me is shift adapt p...
2001 Chevrolet Silverado 3500 6.6L No Start, MIL Lamp on VIN: 1GCJC39131
installed new injectors has not started since check for broken wires none found voltage ok can clear codes but they pop right back Trouble codes: U1800, U2104
2001 Chevrolet Blazer LS 4.3L Hesitation, Cuts out VIN: 1GNCS13W11
Now vehicle will barely accelerate to 25 mph. no codes in computer check spark. fuel pressure.
2001 Chevrolet Express 1500 4.3L Hesitation, Misfire, MIL Lamp on VIN: 1GCEG15W81
This one has got me stumped. Customer complaint is MIL on and pinging noise under load or at highway speeds. Test drive vehicle, with Tech II scan tool, and watch misfire data. Found that cylinder #2 is misfiring on scan tool but no noticable misfires are felt... Trouble codes: P0300 (multiple cylinder misfire), P0302 (cylinder 2 misfire), P0335 (crankshaft position sensor circuit)
2002 Chevrolet Cavalier 2.2L Poor Idle Quality, Stall VIN: 3G1JC52472
Hello everyone. We have an 02 cavalier returning to the shop for a condition that we were unable to rectify. It came in with an engine that idled up and down (more than normal) and stalled when the a/c was turned on. We checked for codes and pulled a code for ...
2005 Chevrolet Silverado 1500 LS 5.3L Poor Idle Quality, Misfire, MIL Lamp on VIN: 2GCEK13T75
First of all thanks to all who have read this request. This pick-up belongs to a good friend of mine and the day after he paid it off along came the problem. The truck intermittently on accel in the 1500-2500rpm range the truck will miss like hell. It may go d... Trouble codes: P0300 (Random Misfire), P0131 (B1S1 O2 Sensor)
1998 GMC Sonoma SLE 2.2L Stall VIN: 1GTCS194XW
This truck was brought in last night because it is hard to start when it sits for a few hours. Reminds me of a fuel reugulator leaking down. Checked that first. There were no signs of fuel at the vacuum line attached to the regulator. I checked the fuel pressu...
1999 GMC Sierra 1500 SL 5.3L Transfer case VIN: 1GTEK19V9X
Hi all, thanks in advance for any help I receive. I don't have any repair history on this vehicle since it was just purchased by a customer's 19 year old son. He brought it in saying he thought the transmission was going out because of a loud clunk he was hear...
2003 GMC Sierra 1500 HD SLE 6.0L MIL Lamp on VIN: 1GTGK13U53
Intermittent codes P0120 & P0220. Turning on check engine light and reduced power. Have cleaned two grounds on back of cylinder heads,chassis grounds, and also main block grounds. Have replaced throttle body and T.P.S. assembly, Throttle body module and APP pe... Trouble codes: P0120, P0220
2002 Pontiac Grand Am GT 3.4L Lack of power VIN: 1G2NV52E82
This car came to me a week ago. Customer complained of lack of power. There was no check engine light on at this time. Went to the fuel filter and changed it, "black" fuel came out. Changed the filter added a cleaner and told the customer to see if that helps. Trouble codes: P0420

Fixes & Summaries for GM
Fix/Summary Answers
1996 Buick LeSabre Custom 3.8L rear suspension VIN: 1G4HP52K2T
This was my first help request and i was shocked my the response i recieved THANK YOU to all. I replaced the rear struts and aligned the car problem solved i found out later the 17 year son was on a joy ride with some friends in a corn field I believe the driv...
1994 Cadillac Eldorado 4.6L Stall VIN: 1G6EL12Y4R
Not sure if this fixed the vehicle but found alternator to be faulty at idle. Trouble codes: P0022, P0036, P0070, P0095.
1985 Chevrolet S10 2.8L Stall VIN: 1GCCS14B6F
Really weird one here. Turns out it was the O2 sensor. The sensor was intermittently not reading correctly and after doing the factory prescribed carb adjustments would cause it to run lean. Which wasn't too much of a problem when warm. But caused a big proble...
1986 Chevrolet K10 Custom 5.7L 3-4 gear VIN: 2GCEK14C7G
thanks for the replies i think i will replace the trans agen
1990 Chevrolet Lumina 2.5L Cuts out, Stall VIN: 2G1WL54R8L
sorry for the long wait time to close. The customer declined further testing stating the vehicle was not worth the money to fix. Trouble codes: 44 (lean exhaust indicated.).
1990 Chevrolet Corvette 5.7L compressor VIN: 1G1YY11JXK
Replaced the programmer, incorrect voltage being transmitted.
1992 Chevrolet K1500 Suburban 5.7L Poor Idle Quality, Surge, Stall VIN: 1GNFK16K5N
Turned out to be the ECM. For some reason it just could not control the Iac.
1997 Chevrolet Astro 4.3L brakes & steering VIN: 1GKDM19W7V
This was a parts store fault on this one. They kept sending us the wrong power steering pump. We replaced the valve in the back of the pump, which did no good. We went to a different source, and got the right pump. After driving vehicle for several days, the s...
1998 Chevrolet K1500 Suburban LS 5.7L Misfire VIN: 3GNFK16R1W
Thank everyone for their help. Customer needed their vehicle for the weekend and hasnt had a chance to return. MAF sensor data checked out ok and even ran the numbers on a volumetric efficiency calculator. All good. When driving and miss occurs, there is n...
2000 Chevrolet Blazer LS 4.3L Poor Idle Quality, Misfire, MIL Lamp on VIN: 1GNDT13W7Y
Thanks for all the help I received. I found the intake valve on #4 was sticking. I put additive in fuel and oil and ran cleaner through intake. Cutomers has called after a wek of driving and said everything is fine Trouble codes: P0304 (4 cyl. misfire).
2001 Chevrolet Lumina 3.1L poor braking VIN: 2G1WL52J91
we turn rotors and drums and replaced the padsw and shoes, now the car stops very good, thankyou very much for the help!!!
2001 Chevrolet Impala LS 3.8L fuel gauge radio VIN: 2G1WH55K71
2001 Chevrolet Express 2500 5.7L Hesitation, Surge, Cuts out, Misfire, MIL Lamp on VIN: 1GCGG25R11
Well, thanks for your efforts friends, but nothing came up conclusive...This has to be the biggest stomper in my career..The problem once again went into hiding...The driver has gone another 1000 miles with no problems... Trouble codes: P0706 (Transmission range sensor ckt), P0335 (Crankshaft position sensor ckt).
2001 Pontiac Grand Am SE 2.4L trac off light VIN: 1G2NE52T51
I found the IAT sensor unplugged it didn't set a check engine light but it did cause the trac light to come on after I plugged the sensor back in and cleared the trac code the light stayed out. New one for me haven't seen that before.
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