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Professional Automotive Repair Technical Discussions for February 5, 2009 International Automotive Technicians' Network (iATN) - Members Only |
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Open Help Requests for GM
| Help Request | Answers | |
| 2000 Buick Century Custom 3.1L Surge VIN: 2G1WS52J4Y This vehicle started power surging all at once. Thought cat. conv. was plugged - it was not. Have changed fuel filter. Fuel pressure is ok even when surge is happening. MAF has movement on scan tool, but unplugging it makes the surge more definite at a higher ... |
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| 2000 Buick LeSabre Custom 3.8L No Start, tach inop VIN: 1G4HP54K0Y this car was towed in for a crank, no start condition. the car will run all day with brake cleaner being sprayed into the intake. fuel pressure is good but I have no injector pulse. injectors have battery voltage at them but are not being grounded by the PCM. ... |
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| 2001 Buick LeSabre Custom 3.8L Extended Crank VIN: 1G4HP54K02 This vehicle has an intermittent extended crank, but happens alot. The ignition is firing but has no injector pulse. When the injectors start to pulse the engine starts right up. The CKP & CMP signals to the ignition module and PCM look good and are present du... |
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| 2003 Buick Rendezvous CX 3.4L Noise VIN: 3G5DB03E83 Hi John, Hope you don't mind if I post these messages on iATN. Thanks for your reply. We're still fighting this thing. I was hoping I could talk to you on the phone sometime when it's convenient for you. The frequency of the noise/vibration I think is more of... |
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| 1996 Cadillac DeVille 4.6L MIL Lamp on, HIGH IDLE VIN: 1G6KD52Y1T I got this Cadillac here with a code P0507 high idle. At idle the engine is running at 1050 rpm which is about 400 rpm too high. Checked for air leaks and found that when the PCV was removed from the valve cover the idle came down a little, but not enough. Als... Trouble codes: P0507 |
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| 1994 Chevrolet Caprice Classic 5.7L downshift VIN: 1G1BL52P55 Hello all, I don't normally do transmission work anymore but since my shop is slack I took it on. Customer complaint was that the tran takes off in a higher gear. I checked codes and found one referring to the 3-2 solenoid circuit. Having never been inside one... |
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| 2000 Chevrolet Blazer LS 4.3L 1-2 shift VIN: 1GNDT13W3Y Vehicle belongs to dealer. P0753 stored 1-2 shift valve. Stuck in 3rd on scanner and take off. Tried Transmission range sensor and 1-2 shift solenoid. Still in 3rd. Pulled pan. Have voltage on both solenoids. Seems like both are energized. See where ignition s... |
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| 2002 Chevrolet Monte Carlo SS 3.8L Stall VIN: 2G1WX15K32 I have taken care of this car all of it's life. Four weeks ago it cam in with a bad hesitation and a mass air flow code.I replaced the mass air flow and the car seemed to run fine.A few days later I got a call that the car would start and stall hot.I got the c... |
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| 2002 Chevrolet Silverado 1500 5.3L Poor Idle Quality, Surge, Misfire, MIL Lamp on VIN: IGCEK19T22 Hi Gang! This is my brothers truck, has had an on going problem with this vehicle. Only when cold there is a noticeable misfire and rough running with the MIL coming on and reading the above codes. I have performed basic system checks but found nothing outn of... Trouble codes: P0171, P00, 174 (Lean Bank 2), P00, 300 (Random multiple misfire) |
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| 2002 Chevrolet Tahoe LS 5.3L Poor Idle Quality, Stall VIN: 1GNEC13Z82 I have a Tahoe that idles low (250-400) at times mostly when it is cold. I picked up the vehicle this morning and it would not hardly run and kept dying on me if I kept the idle up it would stay running. When I got it to the shop it ran fine and has not acted ... |
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| 2006 Chevrolet Uplander 3.5L starting VIN: 1NGBX54KD6 thanks in advance for looking at this.i have this 06 uplander that wont start on very cold days below 32f.i have duplicated several times..i saw other posts like this and they replaced ignition switch,did that same thing happened.this morning went out to test ... |
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| 2001 GMC Yukon XL 2500 SLE 6.0L Misfire, MIL Lamp on VIN: 3GKGK26U81 Hi, fellow members, I want to tank you in advance for your help, this truck came for smog inspection to my shop, as soon as r.p.m. increased to 2500, service engine soon light came on, and d.t.c. p0300 sets in ecm, customer took it somewhere else for repairs, ... Trouble codes: P0300 |
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| 1999 Pontiac Sunfire GT 2.4L Misfire VIN: 1G2JD12T8X 1999 pONTIAC SUNFIRE gt WITH 2.4 QUAD MOTOR. CAR CAME IN WITH A CYL 1 AND CYL 2 MISFIRE CODE. UPON INSPECTION WE FOUND CYL 1 AND 2 TO BE SATURATED IN OIL, COMMING FROM THE CAM BOX GASKETS AND VALVE COVER GASKETS. WE REPLACED THESE GASKETS, SPARK PLUGS, SPARK P... Trouble codes: P0301 (cyl 1 misfire) |
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| 2003 Pontiac Grand Prix SE 3.1L Mechanical VIN: 1G2WK52J83 New customer came in, heard noise from upper engine and added oil. Noise went away but was concerned as last time he heard this, he had an oil pump go out. We check and oil was 2 quarts overfull. Also noticed condensation on oil cap and steam coming out of val... |
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Fixes & Summaries for GM
| Fix/Summary | Answers | |
| 1999 Buick LeSabre Custom 3.8L No Start VIN: 1G4HP52K5X Hello all, thanks for the many replies, all very helpful. Many pointed out where the EGR tube enters the intake is a area where coolant leaks. This was the case, visible with the throttle valve removed or with a mirror. Also coolant was in the oil. Low crankin... |
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| 1991 Chevrolet K2500 Cheyenne 5.7L Poor Idle Quality, Hesitation, Surge, Cuts out, Misfire, VIN: 1GCFK24K3M before putting in another distributor. I ran a smoke test it passed. no vacumn leaks found. I checked egr opened it with vacumn and engine stalls so thats working. test drove with fuel pressure tester tbi spec 9-13 psi i was at 12psi. i never got it to po... |
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| 1999 Chevrolet Astro 4.3L Misfire, MIL Lamp on VIN: 1GNDM19W1X Wow, it sure looks like a lot of people have had the same problem as mine. There also seems to be a lot of different opinions on what fixes them. I chose to check the distributer since it did have 275,000 km on the vehicle, plus that seems to be the most com... Trouble codes: P0300. |
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| 2001 Chevrolet Prizm 1.8L headlamps VIN: 1Y1SK52831 Hello I found that the DRL module was cooked. I opened it up and could see where it had burnt. I did find a loose ground at the left kick panel. I also pulled the other grounds and cleaned and resecured them. The car seems to be doing great now. Thanks go out ... |
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| 2001 Chevrolet Impala LS 3.8L cooling fans VIN: 2G1WH55K51 90% of replies stated to replace thermostat, installed new stat, everything is good so far, funny that this vehicle never set a DTC #P0128, however I am confident that it is cured. Thanks for all the replies, have a great day! Mark |
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| 2004 Chevrolet Suburban 1500 LS 5.3L radio and dic VIN: 1GNFK16T84 WE INSTALLED AN AIR BAG CLOCK SPRING AND SO FAR IT IS OK.THANK YOU. |
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| 1999 GMC Jimmy SL 4.3L Unknown VIN: 1GKDT13W9X We got several useful replies to this one, so we went from having zero knowledge about it to having a little knowledge. Had the customer bring the vehicle back to us for a second look, based on out new gained iAtn info. We checked the vacuum hoses and found a ... |
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| 1997 Oldsmobile Achieva S 2.4L Security system VIN: 1G3NL52T7V Vehicle is fixed!! Mark suggested bcm, this system does not use the bcm, just the pcm and instrument cluster with the lock cyl. Paul gave a procedure for bypassing the system, but info given was for vats system, not a passlock system, this car does not have a ... |
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| 2006 Pontiac G6 2.4L electric steering VIN: 1G2ZF55B16 Thanks to all replies. it was just a recalibration. like new again. but how and why in what relation would it do that, i don't know. thanks again to all. |
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