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Prev Professional Automotive Repair Technical Discussions for June 4, 2008
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(Also Available: All, Asian, Chrysler, European, Ford, GM.)
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Open Help Requests for GM
Help Request Answers
1998 Cadillac DeVille 4.6L Radio, power windows VIN: 1G6KD54Y6W
This Deville does not time out the power windows, radio, etc. and will not shut them off when the doors are opened as it should. The customer has been removing the radio/phone fuse in the trunk to keep the battery from going dead. I would like to check the tim...
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2001 Cadillac Catera 3.0L abs/tcs VIN: W06VR54R51
This car came into the shop with an owner complaint of the CEL, ABS & TCS lights coming on intermittenly and the speedometer not working while the lights were on. I scanned it and get the code U2108 from the transmission & engine modules and a U1128 from the b...
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1991 Chevrolet S10 2.5L No Start VIN: 1GTCS14E5M
can't really see to well under intake but something is being affected just by moisture in the air. any help would be appreciaited
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1995 Chevrolet K1500 5.0L clutch VIN: H3SE217790
this truck has turned into a nightmare. simple job just replace clutch. when truck came in to shop it had problrm with going into gear without grinding and made swishing rubbing noise deiving on road test. we installed clutch and all parts i listed. after all ...
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1996 Chevrolet Blazer 4.3L Poor Idle Quality, Poor Fuel Economy VIN: 1GNDT13W8T
Hi guys, This vehicle has developed a rough running on start up that last for several miles. Rough enough the owner at times has to pull over and shut the engine off and restart it. Sometimes that helps. They say that the milage has gone way down. I know tha... Trouble codes: P0420 (TWC System low efficiency Bank 1), P1345
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2000 Chevrolet Blazer LS 4.3L Cuts out VIN: 1GNDT13WXY
THE VEHICLE DRIVES FINE UNTIL IT REACHES 3000 RPM UNDER A LOAD OR AT IDLE AND THEN STARTS TO CUT-OUT. WHEN A SCANNER IS HOOKED UP AND DATA IS OBSERVED. aT 3000 RPMS THE RPM DATA WILL READ 7500 RPMS WHEN THE VEHICLE STARTS TO CUT-OUT Trouble codes: P0339
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2003 Chevrolet Malibu 3.1L No Start VIN: 1G1NG52J73
This vehicle is an intermittent no start. I have only duplicated the concern 3 or 4 times when it did it I have good fuel pressure, etc. I have no spark though. The no start is not a hard no start meaning you can crank for about 10 to 15 seconds and all of a s...
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2004 Chevrolet Trailblazer LS 4.2L MIL Lamp on VIN: 1GNDT13S64
This Trailblazer came in with check engine light on and a complaint of hard to fill with gas keeps kicking of the noozle. tkaes forever to get it full. It also has a code P0455. I removed the vent valve and it is full of dirt. I am going to order a new valve a... Trouble codes: P0455 (Large Leak Detected)
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2004 GMC Sierra 2500 HD SLE 6.6L MIL Lamp on, black smoke VIN: 1GTHK23284
This vehicle sets a MAF code on every start up, 17 seconds after engine start. I can see exactly what it is doing but not why. The MAF GPS is too high at idle, 55-60 GPS. However, the voltage seems to be exactly correct at 1.25 to 1.35 on the scan tool, and 1.... Trouble codes: P0101 (MAF Performance)
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2000 Oldsmobile Alero GL 3.4L Misfire VIN: 1G3NL12E7Y
Misfire on cyl # 2. Misfire counter randomly counts. No obvious problem seen. Suspected Dirty Injector / Valves. Cleaned injectors & top engine cleaned. Seemed to help in the bay but still misfires intermittently on road test. Customer installed plugs & wires....
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2001 Oldsmobile Alero GL 3.4L coolant fans VIN: 1G3NL52E81
we have car with cooling fans runing only when engine is running.and ac in off pos.code po128.this car came to us from shop that replaced.coolant temp sensor thermost.we have ck the above parts,all ck ok. customer said cooling fan. did same thing before. then ...
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1991 Pontiac Grand Am LE 2.3L Surge, Cuts out VIN: 1G2NE14A3M
Hello everyone,i have this grand am,when you put the accelerator to the floor the rpm go to 3000 then down to about 2500 then back to 3000 and so on.i checked the data and found that the coolant temp reads 150 degrees c when its cold.i have a variable resistan...
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1999 Pontiac Montana 3.4L Airbag light VIN: 1GMDU03E8X
Hello all i have a 1999 pontiac montana in my shop. The air bag light is on. I pulled codes with my modis and it comes up as a B1030 undefined code. I can not find a diagnosis on this code in all data. If any one has any insight on this code it would be greatl...
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2000 Saturn LS1 2.2L compressor fuel gauge VIN: 1G8JU52F61
We have a 2000 Saturn L100 with a 2.2 here. A/C Clutch wont engage and fuel gauge reads full. Originally we saw the bcm was not getting an A/C request. We found a bad connection on the connecter on the back of the contoller. We bent the pin on the control head...
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2001 Saturn L300 3.0L MIL Lamp on, No power VIN: 1G8JW54R81
Hello everyone. We are a Ford dealership trying to daignose this fine Saturn. Problem with the electronic throttle body controls. First concern is that I have no communication with my Snap-on Modis, with either PCM or ABS modules. Talks to BCM ok. Used Generic... Trouble codes: P1516
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2001 Saturn L300 3.0L No Start VIN: 1G8JW52R81
Towed in by owner, crank no start, can here fire and sounds like no injecter pulse. Can see no rpm on tach or on scanner when turned over.TPS voltage at 1.17v at closed throttle.TPS % shows 15 at closed thro and 99 at wot.App 1 voltage is .41 at closed throt a... Trouble codes: P0463 (fuel level snsr ckt signal), P0453 (evap pres sign high or open), P0123 (tp or app 1 ckt open or high), P0122 (tp or app sens 2 short or low), P0123 (tp or app 1 ckt open or high)
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Fixes & Summaries for GM
Fix/Summary Answers
1993 Cadillac Eldorado 4.9L Poor Idle Quality, High cruise idle VIN: 1G6EL12B5P
We tried to go through the re-learn process several more times with no positive results. The customer does not want to spend the money fixing the A/C, so he's going to run it like it is.
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2000 Cadillac Eldorado ETC 4.6L front end VIN: 1G6ET1293Y
Sorry for the long delay closing, just wanted to make sure this was done. I over thightened the front axle nuts and that has so far cured the problem. Thanks to all that replied.
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2003 Cadillac CTS 3.2L all door locks VIN: 1G6DM57N23
sorry for the delay, went on vacation, grounds for door modules and rim module were cleaned with same results, customer was given a estimate on rim module replacement and has rescheduled for next month.
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1994 Chevrolet K2500 Cheyenne 6.5L No Start VIN: 2GCFK2957R
Thanks for all the replies. Problem was injection pump. Tapped on control module and fired right up. Thanks for all the help Kevin
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1996 Chevrolet K2500 Cheyenne 5.7L Surge, MIL Lamp on VIN: 1GCGK29RXT
Customer is going to return for inspection of the crank sensor and tone ring, when he does, I will post the information and or fix, thank-you all who responded. Trouble codes: 1345 (distributor/crank sensor correlation problem).
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2004 Chevrolet Silverado 2500 HD 6.6L ipc,doorlocks VIN: 1GCHC23104
I WANT TO THANK EVERYONE WHO RESPONDED. IT WAS THE TRANS RANGE SELECTOR SWITCH. THE INFO ABOUT THE TECH 2 REALLY NAILED IT THANKS
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2004 Chevrolet Classic 2.2L Surge, Misfire, MIL Lamp on VIN: 1G1ND52F64
Thanks to all who replied. Got the Malibu back in and one of the techs checked the timing chain. It was very loose and flopping around. The plastic chain guide was in three pieces and one of the hold down bolts was being used as the guide. Looks like a new gui... Trouble codes: P0300 (Multiple cylinder misfire).
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2004 Chevrolet Silverado 2500 HD LS 6.0L MIL Lamp on, reduced power VIN: 1GBHC24U64
sorry for the delay, but I wanted to see if this vehicle would come back. I retested all connections, and wires, and again found no problem. I retested the APP, and found no problem. so, I replaced the TAC module...this time it did the trick. thanks for the he... Trouble codes: P1125 (The PCM detects a difference between APP sensor 1 and APP sensor 2).
3
1989 Oldsmobile Cutlass Ciera 2.8L No Start VIN: 1G3AJ51W8K
WELL FIRST OFF THANKS TO ALL THAT REPLIED. MOST OF YOU SUGGESTED I OHM THE INJECTORS, SO I STARTED WITH MAKING SURE I HAD POWER AT THE INJECTOR HARNESS AND NOTICED I HAD POWER ON THE GROUND SIDE AND POWER SIDE OF THE INJECTOR HARNESS. I PULLED THE UPPER INTAKE...
29
1996 Oldsmobile Bravada 4.3L Cuts out VIN: 1GHDT13W3T
I do thank everyone who responded to my request itwas all very useful. But everything was ok where ever I checked, so I took the cap back off just to see if anything was pinched which it wasn't put thew cap back on and installed the module and coil assembly fr...
5
1995 Pontiac Grand Am SE 3.1L No Start VIN: 1G2NE55M55
We followed you all's suggestions pretty closely, not wanting to overlook any of your wisdom; even if it meant doing something over again. Charles from New York, The vehicle did not sit before this problem started. It was the customer's daily driver and...
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1997 Pontiac Sunfire GT 2.4L iGNITION kEY VIN: 1G2JD12TOV
Thanks to all for the help. She had the ignition switch replaced. Joe
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