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Prev Professional Automotive Repair Technical Discussions for December 5, 2007
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(Also Available: All, Asian, Chrysler, European, Ford, GM.)
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Open Help Requests for GM
Help Request Answers
1991 Buick Park Avenue 3.8L Excessive Emissions, Poor Idle Quality, Hesitation, Stall VIN: 1G4CW53L6M
Hey every body, a friend of mine braught this car into me because it runs terrible when warm and dies soon after. I'm not talking about it dies when completly hot it dies a few minutes after starting.the tests i have run are; fuel pressure, spark,injector impu... Trouble codes: #43
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2003 Buick LeSabre Custom 3.8L MIL Lamp on VIN: 1G4HP52K43
O2 sensor 2 readings were flat lined at 430 mv. Disconnected sensor connector and found corrosion on terminals. I am trying to find the source of the corrosion in the connector, I am suspecting a possible infiltration at a splice, but as yet have not been able... Trouble codes: P0140 (O2 sensor 2 insufficient activity)
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1994 Cadillac Seville STS 4.6L Stall, MIL Lamp on VIN: 1G6KY5293R
Hopefully one of the Cadillac techs can lead me in the direction of fixing this problem. I am trying to do a smog inspection but the check engine light does not go on when the key is tuned on but it goes on immediately after starting the engine and it sets a c...
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1997 Cadillac Catera 3.0L brakes VIN: W06VR52R0V
customer complaint was pulls right hard when braking. we replaced front brake pads rotors calipers & frt brake hoses & car pulls right hard on normal braking. we have replaced a worn idler arm & no improvement. we pinched rear calipers lines & same problem. pl...
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1995 Chevrolet K2500 Suburban 6.5L Stall, MIL Lamp on VIN: 1GNGK26F5S
Need help with a GM diesel, I've got a 05 6.5 turbo when it cam in it had been sitting for about 18-20 months so there were some issue right up front. We have put batteries and a starter in, transfer pump(frame mounted)fuel filter and injection pump. Now comes... Trouble codes: 34 (idle stepper motor)
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2000 Chevrolet Blazer LS 4.3L Hesitation, Stall, no power VIN: 1GNDT13W5Y
test drive-lack of power when driven like exhaust was plugged. convertor was rattling inside. mouse nest in air filter box. replaced air filter and had convertor replaced. vehicle now has code p0101 in it. replaced mass air flow and code gone. But since conver... Trouble codes: P0010
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2000 Chevrolet S10 2.2L Unknown VIN: 1G0CS14542
This vehicle was brought in to our electrical shop by a local parts store. The transmission was recently replaced or overhauled. After they received the vehicle back from the transmission shop the transmission would try to change gears while idling. They took ...
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2001 Chevrolet Silverado 2500 6.0L Airbag light VIN: 1GCHK29U51
Hope a GM tech can help. I've got this 2500 that the airbag light is on, there are no codes, we can communicate with the module but it will not give codes, if you unplug a sensor it will then give you a code for that sensor. Plug it back in and clear the histo...
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2004 Chevrolet Silverado 2500 HD 6.0L MIL Lamp on VIN: 1GCHC29U84
This is the second time i have posted for this vehicle for same issue. Fleet vehicle keeps returning with ses light on for p0446. First time replaced vent valve due to clogged with dirt. Vehicle returned with same issue ( valve clogged with dirt) Found tsb for... Trouble codes: P0446 (evap vent performance)
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1996 GMC Yukon SLE 5.7L No Start VIN: 1GKEK13R7T
Doesn't this just have to be an ECM - or are we missing something...?
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1996 GMC Jimmy 4.3L Poor Idle Quality, Misfire, MIL Lamp on VIN: 1GKDT13W8T
Replaced cap,rotor,plugs and wires vehicle now will start but runs VERY BAD rechecked cap and wire routing all good engine will run but missing bad checked engine vacumme only 5inches vac not good tried disconnecting cat still no good im thinking possible plug... Trouble codes: P0300
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1997 GMC Yukon SLE 5.7L Coil VIN: 1GKEK13R9V
Well this all started with no fire at the coil ,i replaced the Cam sensor ,crank sensor,Coil ,Coil module,when i noticed fuel at the cap of the injectors ,well noticed fuel on the wiring harness down to the computer , ive put a new spider injection system in a...
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1998 GMC Jimmy Envoy 4.3L MIL Lamp on VIN: 1GKDT13W6W
Having quite an odd time w/ this vehicle. Repaired misfire by installing "revised" injector assy. Still have occ. MIL and p0300 which is keeping vehicle inspection sticker from happenning. Have tried multiple times to perform crankshaft variation relearn w/Tec... Trouble codes: P0300
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2002 GMC Sierra 2500 HD SL 6.6L Gear range VIN: 1GTHK23162
When you shift this truck into gear (reverse or Drive) it will go into gear just fine and start to move, then it kicks to neutral and the range indicator on the dash starts to flash. It only does this on occasion and usually if you shift to park and back to ge...
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2007 GMC Sierra 3500 HD WT 6.6L MIL Lamp on, lack power VIN: 1GTHK33677
Hi i have a 2007(new body) gmc duramax air filter plugged with snow customer was on really snowy highways the unit began to loose power and was only able to do 30 kph towed unit in found air filter plugged with snow . I called the local gm dealer and they are ...
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1992 Pontiac Grand Am SE 3.3L No Start VIN: 1G2NE51N5N
hello everyone,this car has a severe backfiring in the intake manifold while cranking engine over to start.i did a compression test:4 cyl's:150psi 2 cyl's:160psi.engine used to start with this backfire condition(very hard) but now won't start at all(although i...
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2003 Pontiac Sunfire SE 2.2L Headlamps VIN: 1G2JB52F53
Hi iATN, thanks in advance for the help. Condition is as follows: No DRL operation, no low beam operation, right side high beam works but leaves 1 volt behind and all other headlamps light up dimly. All test done as stated above. Any help would be AWESOME. Tha...
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Fixes & Summaries for GM
Fix/Summary Answers
1986 Buick Century Limited 3.8L ignition VIN: 1G4AL1933G
Thanks to all that replied. Your help is greatly appreciated. It turned out that we had a bad ignition coil from napa, and a bad (new) cam sensor from napa. we replaced those items with gm parts and all is well. Thanks again for all the help. Happy Holidays!
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1992 Buick LeSabre Limited 3.8L brakes VIN: 1G4HR53L3N
Thanks for all the replies. This one ended up being a bad master cylinder as some of you mentioned. We did not know the master was split diagonally. The ABS light is not fixed but the brakes work now.
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2000 Buick LeSabre Limited 3.8L cluster/radio VIN: 1G4HR54K2Y
RECIEVED 12 REPLIES ON THIS BUICK-MOST POINTED TO BATTERY,CONNECTIONS AT BATTERY OR IGNITION SWITCH PROBLEMS.THIS CAR HAS BATTERY UNDER BACK SEAT,BRAND NEW BATT,WE CHECKED CONNECTIONS AND DID FIND LOOSE GROUND LUG WHERE IT CONNECTED TO FLOOR PAN BUT THIS DID'N...
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1996 Cadillac DeVille 4.6L MIL Lamp on VIN: 1G6KD52YTU
Thanks to all, and sorry for the delayed close. I was unable to repair this one as the customer has not returned, I will update if he comes back. I got 3 replies and all seemed to be on the same page as far as the possibility of a bad pcm. I believe that this ... Trouble codes: 01645 (purge control problem).
3
1998 Cadillac DeVille 4.6L MIL Lamp on VIN: 1G6KD54YWU
Thanks to all who replied. I pulled the valve covers and timing cover and found bank one exhaust cam one tooth off. Aligned marks and the car has no misses in the misfire counters. I find it hard to believe the machine shop can't get these in time. Trouble codes: P0300 (Multi Cylinder missfire).
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1995 Chevrolet Tahoe LS 5.7L Hesitation, Cuts out, Misfire VIN: 1GNEK13K1S
Well, the vehicle is not yet fixed but we believe the problem to be the incorrect fuel pump as so many of you suggested. The customer is in the middle of a move and we are waiting on approval to install a factory pump. Thanks for all the help. We'll update lat...
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1995 Chevrolet S10 4.3L Hesitation, Misfire, MIL Lamp on VIN: 19W3S82631
As most of you stated there was leaks under the plenium. I found the fuel regulator and the inlet feed line leaking under the plenium. Replaced injector spider and both feed and return hose and this brought short term fuel triim to between +3 and long term to ... Trouble codes: 0300 (multiple misfire).
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1996 Chevrolet Corvette 5.7L engine compartment VIN: 1GYY2256T5
Thank you all for your responses, this fire burnt for a while making the cause more difficult to find. Aloha Larry [...]
7
1996 Chevrolet Cavalier 2.2L brakes VIN: 4GIJF32TOT
WOW I CAN'T BELIEVE THE HELP I HAVE RECEIVED ON THIS CAR...THIS IS MY FIRST TIME I HAVE USED THIS SINCE JOINING...IM SO IMPRESSED...WELL THE PROBLEM WAS THE DRUMS...THEY WERE OUT OF ROUND...I RECEIVED ANOTHER SET AND THOSE WERE OUT OF ROUND TOO...I DID A LIGHT...
7
2001 Chevrolet Monte Carlo LS 3.4L wiper motor VIN: 2G1WW12E91
It was a bent tab on the assembly. thank-you everyone for your help.
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2001 Chevrolet Impala 3.4L fuel guage and temp guage VIN: 2G1WF55EX1
appreciate all the responses, allen [...]. and all other responses on fuel guage was correct bad sending unit. total cost...
14
2003 Chevrolet Silverado 2500 HD 6.6L Hesitation, Cuts out, Stall, MIL Lamp on VIN: 1GCHK23113
THANKS Everyone for the replies, I installed new injectors and it fixed the problem. Thanks Brent for explaining how to check the return flow. Trouble codes: P0087 (P0087 for fuel rail pressure too low.), P0089 (The difference between actual and desired FRP is more than 20 MPa), P1093 (The difference between commanded fuel pressure and actual fuel pressure is more than 20 MPa.).
9
1997 GMC Sonoma SL 4.3L Heater VIN: 1GTC319X1V
Hey guys thanks for all the help the customer decided to take the vechicle.If he returns with it i will consider to change the ignition switch thank you and god bless
13
2003 GMC Envoy XL SLE 4.2L Hesitation, Surge, Cuts out VIN: 1GKET16573
Well, all help offered was help I considered. Many suggested cooling fan/sensor problems or TPS connector & wiring, Scott and Mitchell were on the right track with a ground or connection problem. I ended up finding that just barely touching the PCM wiring it w... Trouble codes: P0495 (Cooling fan speed high), P0172 (System rich Bank 1), P0705 (Trans Range Circuit), P1221 (TPS Performance/Fuel Pump Circuit), P1271 (APP Sensor 1-2 correlation error), P1523 (Electric throttle control throttle return).
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2000 Oldsmobile Alero GL 2.4L Misfire VIN: 1G3NL52T9Y
hello and thank you all for your time. the problem here was the alternator. we did verify a/c voltage... approx 2v a/c ... upon presenting this to the customer he exclaimed "oh yeah I forgot to mention the intermittant battery light" we installed bosch reman a... Trouble codes: P0300.
7
2003 Saturn L300 3.0L hard start VIN: 1G8JU52F11
thanks to everyone that helped..but the problem was the purge valve was broken inside...venting the fumes in the motor when fueling the car...replace with a new one works perfect! thanks for all your help
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