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Professional Automotive Repair Technical Discussions for June 24, 2009 International Automotive Technicians' Network (iATN) - Members Only |
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Open Help Requests for GM
| Help Request | Answers | |
| 1998 Buick Century Custom 3.1L odometer VIN: 2G4W552M6X This car was donated to us to refurbish and sell at a deep discount to a struggling family referred to us by a social assitance agency. We discoverd the shift and odometer illumination fade in and out on the cluster. We haven't been able to connect this to any... |
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| 1991 Cadillac Allante 4.5L No Start, Poor Idle Quality, Stall VIN: 1G6VS3381N Greetings all, I have this wonderful Cadillac, that I shouldn't have touched,came in as no start after customer bar-b-qued it. Low compression, coolant shooting out of radiator when cranking all the obvious blown head gasket signs. Sold a complete valve job. W... |
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| 1997 Cadillac DeVille 4.6L Electronic VIN: 1G6KD54Y1V I have a service brake fluid switch warning coming on instrument panel with a IPC code C1210. I replace master cylinder with new switch and still have the same code. But when you by pass switch warning system shows low brake fluid, so that tells me the circuit... |
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| 1999 Cadillac Seville STS 4.6L almost all electrical VIN: 1G6KY5495X first i want to thank everyone ahead of time for their help and patience. the only working items are the headlights, the seats, the tilt and telescopic wheel, door locks, and the security light. when i turn the key on i have no lights, or gauges except the sec... |
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| 2001 Cadillac DeVille 4.6L a/c clutch VIN: 1G6KD54Y61 hello caddy gurus got a 2001 caddy deville came in with no a/c complaint...i have no clutch engagement,on scan tool it reads no clutch cmd,no a/c relay on...i only have snappy solus so i cant get into bcm...but dont these usaully give a 'service a/c system' on... |
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| 1984 Chevrolet Corvette 5.7L evaorator VIN: 1G1AY078XE I AM IN NEED OF A REPLACEMENT EVAPORATOR, THE ac dELCO pART # IS 15-6386, gm # 3052790. i SAW A PHOTO OF THE CORRECT EVAPORATOR ON EBAY AND A PICTURE OF ONE THAT IS FOR A 1996 VETTE. THEY LOOK THE SAME EXCEPT FOR THE LEGNTH OF THE LOWER TUBE THAT HOUSES THE OR... |
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| 1990 Chevrolet Corvette 5.7L blower volume VIN: 1G1YY3388L car has low volume of air coming out of air vents, came in with blower motor inop, replaced blower . customer has had low flow complaint issue for a while and nobody has been able to figure problem out . saw one fix about reprograming system on iatn but cannot... |
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| 1993 Chevrolet Lumina 3.1L master cylinder VIN: 2G1WL54T6P Hi, Thanx for your time...Cust bought this 93 Lumina for daughter...came in for safety check...rear brakes not working...abs valve of side of master...strong fluid to the fronts...take valve for rears out chamber has fluid...but nothing coming out of valve...a... |
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| 1997 Chevrolet S10 4.3L Misfire VIN: 1GCCT14W6V Vehicle has ignition type break up under a load. New Cap, rotor, plugs and wires. Checked distributor for excessive play.. OK. Relaced cam sensor in distributor and crank sensor. Also replaced TPS. Once vehicle is driven and warm, runs perfect. |
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| 1998 Chevrolet K3500 Cheyenne 7.4L not sure VIN: 1GBJK34J3W Hello everyone. This Dual rear wheel 1 ton came for front brake service (front pad wear indicators squealing) customer also said that there was a pedal pulsation when brakes applied (which to me verified front rotor warp) also had very soft and low pedal. Aft... |
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| 2003 Chevrolet Malibu 3.1L horn VIN: 1G1ND52J23 customer states that the horn blows intermitently when no one is around. might do it couple times a day or may go for a month till it does it when it blows it usually wont stop till the relay or fuse is pulled. he replaced air bag and horn switch same problem... |
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| 2004 Chevrolet Express 2500 LS 6.0L Poor Idle Quality, Misfire, MIL Lamp on VIN: 1GAGG25U84 Hi group this van starts up and idles great when cold but after it idles hot, the engine starts to miss and the check engine light flashes (p0300) if you brake toqure the engine in drive the miss goes away and the check engine light stops flashing (turns off) ... Trouble codes: P0300 |
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| 2004 Chevrolet Suburban 1500 LS 5.3L temp. blend motors VIN: 3GNEC16Z54 Thanks in advance to all that reply! This trucks owner states that at any given time the ac will blow hot air on one side or the other. It will never act up while it's in my shop. It has history codes for both temp blend actuators,b0408,b0414,b0418. It has no ... |
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| 2004 Chevrolet Astro 4.3L No Start VIN: 1GNEL19X54 Hi folks! This van came in on the hook with a no start. Customer said it was hard starting that morning, went a few miles and quit. When we got it, I sprayed carb cleaner in the snorkel and it ran, so obviously we have spark, compression, etc. Checked for inje... |
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| 2006 Chevrolet Express 2500 4.8L Misfire VIN: 1GCGG25V66 guys, I have this van in here and need some help. Can in with a dead missfire. customer replaced plugs and wires. I swapped # 5cyl coil plug and wire to rule out ignition problems. did an injector balance and had# 7 cyl with a 3 lb difference. replaced and is ... Trouble codes: P0300 |
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| 2007 Chevrolet Suburban 1500 LTZ 5.3L No Start VIN: 1GNFK16307 hard start hot soak resart once in a while no codes PCM)BCM ECM anywhere flex fuel engine has unleaded in now according to cust.fuel pressure Ok... switched horn relay with pump relay maybe get lucky started all day no problem till I went to pull in for night ... |
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| 2007 Chevrolet Cobalt LT 2.2L Lighting VIN: 1G1AL55F17 first customers wife said dash lights went out and then the park lamps went out after that so we checked the fuse and put power to fuse and lights would work no codes powered relay and still wouldnt work lights also flash when locking and unlocking with remote... |
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| 1996 GMC Jimmy 4.3L Surge VIN: 1GKDT13W3T Hey guys and gals, This truck came to me with a percieved transmission problem. After a road test with the owner demonstrating the concern, it seemed to be misfiring and surging, more so when the torque convertor was in lockup. It had never been tuned up s... |
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| 2004 GMC Envoy SLE 4.2L All gauges VIN: 1GKDT13554 Hi GM techs, have an envoy with instrument cluster problems. Cust came in with no gauges working, replaced cluster and all ok for about 10 seconds, now only MIL comes on ( goes off when cranked) and back light, no codes stored. I can disconnect battery for 10 ... |
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| 2003 Hummer H2 6.0L Electronic VIN: 5GRGN23U53 I have a B0418 code for blend/temp door actuator for the right side. Of course it is located on the top of the hvac assembly (big black box). Job pays 5.9hr. My question is, is that correct and is there a faster way? Thanks Paul |
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| 2002 Pontiac Grand Prix GT 3.8L abs VIN: 1G2WP52K92 left rear wheel bearing goes to 0 rpms when turning left. has code c0046. replaced left rear wheel bearing, still does same thing. help!?!?! |
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| 2002 Pontiac Grand Prix GT 3.8L low coolant light VIN: 1G2WP52K62 low coolant light staying on. coolant is not low. did simple test that says disconnect harness from sensor, if light goes out replace sensor. did that light back on next day. tsb says possible coolant contamination, flushed coolant, cleaned sensor, light back ... |
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| 2000 Saturn SL1 1.9L Electronic VIN: 1G8ZH5282Y Could use some help with this Saturn.I have 3 codes, p0732,733,734. I removed side cover to check gear to see if it was loose.Got less then 1/4 turn, torqued it to 111 ft. lbs.There is also a TSB for these codes to check input shaft seals ,that was fine. Custo... |
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| 2002 Saturn SL2 1.9L Poor Idle Quality, Hesitation, Cuts out VIN: 1G8ZK52732 Customer complained vehicle was running rough Customer replaced plugs, wires, fuel filter, and fuel pump. Vehicle still runnig rough after replacing parts.Customer brought car to us, Scan test the vehicle and its shows on start up it has major TIP-IN causing v... |
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Fixes & Summaries for GM
| Fix/Summary | Answers | |
| 1995 Cadillac Seville SLS 4.6L MIL Lamp on VIN: 1G6KS52Y6S A new computer is what fixed this vehicle. I believe there was a problem with the circuit in the PCM that monitors the EST line for problems-mistakingly thinking there was an EST circuit problem when no problem actually existed. Thanks for all the help, a 14... Trouble codes: 23 (Ignition Control Circuit Problem). |
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| 1997 Cadillac DeVille Concours 4.6L compressor VIN: 1G6KF5296V HI Y'ALL!!! Thanks for the help. Call in the dogs and piss on the campfire. This hunt is over. The p1654 was for the cruise control. OK the cruise control fuse powers the hi and low pressure switches thru to the a/c programmer and to the pcm input and the A/C... |
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| 1985 Chevrolet Corvette 5.7L Misfire VIN: 1G1YY078XF Thanks to everyone Found that a visual inspection of the cam was not enough.Ended up being 2 exhaust lobes worn down and was missed during a visual inspection with the engine running,had to inspect during crank. Thanks again |
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| 1996 Chevrolet C1500 Suburban 5.7L pressures VIN: 3GNEC16R3T TRUCK HAS BEEN GONE FOR A FEW DAYS NOW CUSTOMER SEEMED HAPPY WITH RESULTS.IT LEFT WITH ABOUT 3.5 LBS IN IT(BOB FROM ARIZONA'S SUGGESTION),52 @ IDLE & 45 @ CRUISE.I'D LIKE IT TO BE COLDER BUT THOSE WERE THE LOWEST TEMPERATURES I GOT.RICHARD,LONG,DOUG,RAYMOND,HO... |
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| 2002 Chevrolet Impala 3.8L Stall VIN: 2G1WF55K82 SORRY TO SAY WE DID NOT FIX THIS ONE. WE REPLACED THE FUEL PRESSURE REGULATOR, FUEL FILTER, IAC, AND CRANK SENSOR. WE ALSO REPROGRAMED THE PCM. WE REPLACED THE REGULATOR BECAUSE IT SMELLED OF FUEL AND THE FUEL FILTER BECAUSE IT WAS PLUGGED. THE CRANK SENSOR WA... |
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| 2002 Chevrolet Silverado 1500 5.3L Rear Differential VIN: 2GCEK19VX2 thanks for all your replies. As of now i have not been able to get the customer back in so i'll just have to wait to put some of your responces to work |
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| 2003 Chevrolet Silverado 3500 LT 6.0L No Start VIN: 1GBJC34U63 CRANK SENSOR WAS THE FIX, NEVER HAVE I SEEN A SENSOR STOP THE STARTER THANKS TO ALL THAT HELPED Trouble codes: U1041 (ebcm loss of comm). |
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| 2005 Chevrolet C4500 Kodiak C4E042 6.6L Fuel Gauge VIN: 1GBE4E1215 Thanks for the confirmation of vehicle needing flash. Customer called after having dealer reprogram computer and all is well. |
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| 2000 GMC Yukon SLT 5.3L Poor Idle Quality, hard start when cold VIN: 1GKEK13T5Y OK this one was kinda crazy. Pretty much everyone was sure we had a ground problem. We went in and cleaned every ground on the truck associated with the drivetrain. I also replaced both battery terminal ends. We still had -40 at the IAT&ECT. We then disconnect... Trouble codes: P0420 (catalyst efficiency). |
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| 1994 Oldsmobile Cutlass Supreme S 3.1L Poor Idle Quality, Stall VIN: 1G3WH15M4R thanks to all that replied. after checking into the code 36, i found that the wires had rubbed through and were open near the bottom of the rad support. turns out, as benjamin and richard pointed out, that this sensor is used at idle. i assume that no signa... Trouble codes: 36 (24x signal error). |
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| 2005 Pontiac Montana SV6 3.5L Engine noise VIN: 1GMDV33L85 Thanks to all who responded. Further diagnostics lead me to believe that the problem was with the lifter, the valve moved freely in the guide once the rocker and spring were removed, I was able to snake a length of hose into the area below the intake manifold ... |
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