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Prev Professional Automotive Repair Technical Discussions for August 11, 2010
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Open Help Requests for GM
Help Request Answers
2004 Buick LeSabre Limited 3.8L Suspension VIN: 1G4HR54K34
HELP!!! OK.. this customer had a major blow out goin down the road... The tire went up into the wheel well and ripped ALL of the wiring out! I got the fuel pump all taken care of and rewired. Now.. the Air Ride!?!?!?! I am hoping that someone somewhere has one...
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2006 Cadillac Escalade 6.0L Aux A/C VIN: 1GYEK63N16
hi guys, this vehicle came in with a/c not working. did a performance check with dye and correct amount of R134a and found leak in a/c lines underneath going to the rear auxilary unit. got new line kit from dealer but lines have been cut in half to fit in box....
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1994 Chevrolet K2500 5.7L Poor Idle Quality VIN: 2GCFK29K4R
customer complaint of rough idle (engine done year ago) ,,typical eng. re&re used old cap wires filter etc. we changed all , cust came back with same complaint, found tbi. dripping fuel we re & re unit and cleaned and resealed, cust returned with same complain...
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1996 Chevrolet Camaro Z28 5.7L No Start VIN: 2G1FP22P1T
Hello this camaro has had 2 delco dist. installed on it at another shop both of them also the one that was on it originaly failed due to the rotor hitting the cap. You can install the dist let it idle all day its fine. But if you go drive it within 8 to 15 mil...
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2000 Chevrolet Venture 3.4L starter VIN: 1GNDU03E7Y
Hi. This venture van, intermitantly when you turn key to crank position will hesitate for 2 to 10 seconds before cranking. PCM gets a good signal from ignition switch while the hesitating is happening but does not energize crank relay untill it starts cranking...
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2000 Chevrolet Blazer LS 4.3L No Start VIN: 1GNCT18W5Y
This Blazer will crank for ever but will not fire and run. It does this every time hot or cold. If I spray a little carb cleaner in the air inlet hose it will fire up and stay running untill you shut it off again. I am thinking of replacing the fuel injector a...
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2000 Chevrolet C3500 7.4L Stall VIN: 1GBKC34J6Y
I have a work truck with a fuel issue. No codes at this time- had a TPS code but is fixed now. The pump will wine in a rythmic, pulsing tone going up and down almost as often as a turn signal flasher would. When it does this the pressure goes from 50 (normal) ...
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2002 Chevrolet Trailblazer LTZ 4.2L heater control VIN: 1GNDT13S82
Customer brought vehicle in because they could not get the key out of the ignition - key would not turn all the way back to the lock position therefore not shutting down all the systems and would cause a battery drain if left. Customer had disconnected the bat...
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2002 Chevrolet Corvette 5.7L compressor clutch VIN: 1G1YY32G32
Air conditioning clutch has a mind of it't own. When compressor engauges system cools well. Found P1546(low voltage to compressor clutch) in memory. Light on a/c switch stays on when system is working, but goes out when clutch falls out. I have switched relays...
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2003 Chevrolet Silverado 1500 5.3L ac compressor VIN: 2GCEC19T63
good morning all. i need help with this one this truck originally came in for ac inop. we found compressor bad due to low pressures so we replaced compressor, dryer, orifice tube, low side switch and 40 amp blower fuse. now the compressor does not come on. com...
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2003 Chevrolet Trailblazer LS 4.2L Cuts out, Reduced Power VIN: 1GNET16S53
After driving vehicle it will go into reduced power mode and cel will come on. Code is 1271. Check tsb's and replaced fan clutch. Drove about 50 miles with no problem. Then problem came back. Very intermitent. Can happen in 1 mile or may take 20 miles. Check a... Trouble codes: 1271 (APP-TP Coralation 1-2 error)
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2003 Chevrolet Corvette 5.7L Cuts out, Stall VIN: 1G1YY12S73
I have a 2003 Chevrolet Corvette that shuts the engine down as soon at it starts rolling and showing vehicle speed. Starts right back up and runs fine. If the clutch is slowly let out, you can creep along below 2 mph without a problem. Problem happens even coa... Trouble codes: C1214, C1221, C1222, C1248, C1277, C1287
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2004 Chevrolet Silverado 2500 HD LT 6.6L Fuel System VIN: 1GCHK29224
Have a truck that was towed in with a no start condition. Customer claims that engine shut off while driving on the freeway. Customer had it towed to a local shop where they replaced the fuel filter. Shop could not get it to start. Vehicle was then towed to my...
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2004 Chevrolet Suburban 1500 LS 5.3L very long crank VIN: 3GNFK16Z84
truck came in with long crank time sometimes. check fuel pressure around 42psi. pressure would drop slowly to 0 psi with key off. truck would not act up in shop. got customer's ok to try fuel pump. came back for same problem tried fuel regulator. went to deale...
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1991 GMC C1500 Sierra 5.7L Excessive Emissions VIN: 1GTEC14K6M
Hey guys, I have a truck here that has failed the nox portion of the California smog check. The egr solenoid is only given a command from the ecm to flow vacuum when the throttle is blipped / snapped. During normal cruise the ecm never commands the egr soleno...
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2007 Hummer H3 3.7L Misfire VIN: 5GTDN13E37
Thank you for your help. We have a misfire in cylinder 4 on this 3.7 engine. We have swapped the coils and plugs, and performed a compression and leak-down test with no problems found. We have seen that there are some problems with the intake valves and cylind...
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1996 Oldsmobile Achieva SL 3.1L Starting VIN: 1G3NL52M7T
this car as no communication betwen the ignition switch and the cluster.when we put the ignition switch on we ear the fuel pump but we dont see any light in the cluster i have 3 codes p1573 p 1629 p1641 i have checked the ignition switch ,the tan wire from the...
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2003 Oldsmobile Alero GLS 3.4L all light in the front dont work VIN: 1G3NF52E93
Tried to check out to see why no lights in the front of the car but all lights work inside and in the rear of the vehicle. radio and engine and everything else is fine. I have tried to test The BCM and mult. function swtch but not coming up with anything. Plea...
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1928 Other GM 302 302CID Camshaft
Engine is a model 302 ,, 900 cid ,,, this is a very special request to all the veteran engine rebuilders out there ,,, i have a friend who has a scripps v12 engine in a restored boat 1928 ,, the engine was running fine until friday ,, started and was running ...
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1998 Pontiac Grand Prix SE 3.8L Misfire VIN: 1G2WJ52K1W
Car came in with dead miss on cylinder #4. Thuroughly checked ignition system. Swaped coils, no change. Swaped modules with a known good test one, no change. Swapped plug wires, no change. Swapped spark plugs, no change. System capable of producing 30,000 volt... Trouble codes: P0300 (missfire)
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2000 Pontiac Bonneville SSEi 3.8L electric windows and locks VIN: 1G2HZ5412Y
have a problem with the passenger windows and door locks not operating. they do not work with the driver door switch or with their own window switches. the driver door window and door lock operates normally. i have tried a driver door module and driver switch ...
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2001 Saturn SL 1.9L gauges VIN: 1G8ZH54861
Good morning Saturn Gurus! I have a good customer with complete failure of dash cluster. I dont have a wiring diagram for this vehicle and am hoping for something besides the standard "replace the BCM" answer. After reading 100+ posts in the archives I dont th...
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Fixes & Summaries for GM
Fix/Summary Answers
2005 Chevrolet Suburban 1500 LT 5.3L Electronic VIN: 3GNFK16Z65
I replaced the heater blower resistor then I sent the suburban to the dealer for a re flash and that did it. The customer has been driving for a week with no issues. All four responses had me looking at grounds, all of which I checked and serviced. Thanks f...
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2006 Chevrolet Silverado 1500 LS 4.3L Poor Idle Quality, Hesitation, Misfire, MIL Lamp on VIN: 3GCEC14X16
SORRY FOR THE DELAY IT ENDED UP BEING A PLUGGED UP CONVERTER WE DROPPED THE EXAUST BUT WERE ONLY ABLE TO DROP IT ABOUT AN INCH I GUESS THAT WASN'T ENOUGH THANKS FOR ALL THE REPLIES GLAD THIS ONE IS GONE. Trouble codes: P0300, P0101.
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2006 Other GM RODEO 3.0L Lacking power VIN: MPATES77H6
well the Rodeo has been fixed.after connecting a compound gauge I could see a lack of boost pressure (almost none at all), so i decided to look at the exhaust system for a blockage. The lack of power had been caused by a blocked diesel particulate filter. afte...
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2000 Pontiac Grand Am SE1 2.4L Engine VIN: 1G2NF52T6Y
WE DID EXACTLY AS THOMAS RICTOR INSTRUCTED. THE MOUNTS LOOKED GOOD EXTERNALY AND EVEN THE OLD LOAD TEST DID NOT REVEAL THE PROBLEM. ONLY AFTER WE LIFTED THE ENGINE SLIGHTLY -THE VIBRATION DISAPPEARED. YOU CANNOT DETERMINE THAT THE ENGINE MOUNTS ARE BROKEN UNTI...
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2003 Pontiac Grand Prix GT 3.8L Transmission VIN: 1G2WP52KO3
Thanks to Marc for the spec on the VSS, about 2000 ohms. Mine was within range so I looked a bit closer at the wiring and the plug and ended up replacing the plug and all is well. Thanks to all who replied with good advice. John
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