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Prev Professional Automotive Repair Technical Discussions for December 30, 2010
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(Also Available: All, Asian, Chrysler, European, Ford, GM.)
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Open Help Requests for GM
Help Request Answers
2004 Buick LeSabre Limited 3.8L Alternator VIN: 1G4HR54K24
Good day to all, and thanks in advance for your help. Customer brought car in for battery going dead over night intermittently. Vehicle needed a jump to bring in. Battery removed for charge and test. Installed new battery to run test and found alt output 44a 1...
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2002 Cadillac Escalade EXT 6.0L Rear Air Ride Compressor VIN: 1GYEK63N12
Hello everyone and thank you in advance for the help...this caddy came in with the problem of when there are passengers in the rear or cargo in the rear the rear air ride compressor stays on until the weight is removed...i have scanned the vehicle and all the ...
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2003 Cadillac CTS 3.2L Alternator VIN: 1G6DM57N43
Engine and ECM replaced(used)at another shop. Vehicle battery would go dead overnight. No alternator output, they replaced with new alternator, no change. We had alternator tested,is ok. Re-install new alternator with original ECM, then alternator charged ok ...
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1999 Chevrolet Tahoe LT 5.7L Poor Idle Quality, Misfire VIN: 1GNEC13RXX
Cust came in with complaint of running rough, and having to keep their foot on the gas to keep vehicle running. codes where p0300, scanned misfire data and found #5 and #7 with multiple counts. Pulled plugs and both looked as though they were running very rich... Trouble codes: P0300
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2004 Chevrolet Express 3500 6.0L Mechanical VIN: 1GCHG35U24
This truck had the transmission rebuilt 50,000km ago no problems works great, It broke the fex plate around the bolts in the centre, we replaced it with a new plate, ran 1 week and cracked it again, I removed the trans, checked the dowels, checked the crank en...
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2004 Chevrolet Express 2500 4.8L Brake Pedal VIN: 1GCGG25V84
Thank you for your time. Well this vehicle came in with a complaint of an occasional low pedal. We could not duplicate so after discussing with customer we replaced master with Car Quest reman. A week later he had same complaint so after trying to get it to ac...
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2004 Chevrolet Tracker 2.5L Stall VIN: 2CNBJ73404
I'm really stuck?This truck came in a nostart.I found no fuel no injector pulse,no spark and no tach.After some searching I found 15a fuse F1 blown out by the battery.Replaced the fuse.The truck will idle but when you try to drive it blows the fuse.replaced wi...
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2006 Chevrolet Silverado 2500 HD LT 6.6L Cooling VIN: 1GCHK23DX6
Vehicle was brought in for a new thermostat. Replaced both thermostats with OEM stats. The cooling system has been bled several times following the GM procedure. The operating temperature flucuates between 160 & 180 degrees, but never goes above 180 degrees. T...
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1987 GMC V1500 Sierra Classic 5.7L Hesitation, Cuts out VIN: 1GTEV14K1H
Been working on this one for a while now. Have 13 psi on fuel pressue. New EGR. New TPS. No codes. Truck hesitates when cold (sits over night in summer or for several hours in winter) upon initial start up and light acceleration. Seems to be around 1/4 thrott...
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1994 GMC Jimmy 4.3L engine VIN: 1GKCS13W4R
hello folks looking for advise. customer came in with coolant leaking from front and back of intake manifold. checked oil no signs of coolant oil mixture. replaced intake gasket, replaced oil and filter, also replaced oil cooler hoses that were leaking oil con...
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1995 GMC C3500 Sierra SLE 6.5L No Start VIN: 1GTHK34F4S
Hello and thank you in advance for reading our post. This diesel belongs to a friend and I agreed to take a look for him. He recently had the head gaskets replaced by another shop in town. Everything was fine for a a month or so and the engine started dieing...
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2001 GMC Safari SL 4.3L gas tank VIN: 1GTDM19W01
Please see above
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2006 GMC Envoy SLE 4.2L Misfire, MIL Lamp on VIN: 1GKDS13S46
Vehicle has a misfire on #3 cylinder at idle. have run compression test has 195-200 psi. ran cylinder leak check with no leakage present. Fuel pressure is good (58-60 psi)and can find no vacuum leaks. cleaned injectors with AC Delco X66 top engine and injector... Trouble codes: P3000
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1999 Oldsmobile Aurora 4.0L Not Sure VIN: 1G3GR62CXX
When cold has very high pitch whine.on idetifix they talked about pouring water on intake to see if pitch changees for the anti-backfire valve.my problem is i cant find that in all data.is it the air ck valve or divertor vavle.i couldnt find any illistrations ...
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1999 Pontiac Grand Am GT 3.4L cooling system VIN: 1G2NW12E1X
This car came in with the complaint that it was leaking coolant and was getting warmer than normal. I found the water pump leaking and replaced it. The reservoir cap was also broken. I retested the system and found that at that at 215 deg coolant would boil ou...
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Fixes & Summaries for GM
Fix/Summary Answers
2000 Cadillac DeVille DTS 4.6L Unknown VIN: 1G6KF5792Y
I had 2 replies to replace the yaw sensor. The part was over 400.00 and I could not guarentee it would fix the problem. At this time the customer said he will live with it for now.
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2003 Cadillac CTS 3.2L Ignition Switch, Windows VIN: 1G6DM57N13
I WANT TO THANK EVERYONE WHO REPLIED. THE DIM MODULE WAS BAD REMOVED AND INSPECTED HAD SIGNS OF WATER INTRUSION.INSTALLED NEW MODULE AND SET UP WITH TECH 2 ALL GOOD.
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1995 Chevrolet Blazer 4.3L Differential VIN: 1GNCS13W5S
MY TECH & I ARE RESPONDING TOGETHER ON THIS FIX.SINCE WE ARE THE LAST TO TOUCH CAR WE ARE IN COMPLETE AGREEMENT ON THIS FIX. WE HONESTLY DON'T KNOW WHY THE PLUG WAS OUT,BUT IT FALLS ON US.WE PUT A USED DIFFERENTIAL IN THE CAR . WE ARE NOT GOING TO CHARGE THE C...
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1996 Chevrolet K1500 Suburban LT 5.7L Park engagement VIN: 3GNFK16R7T
I pulled the pan and found the park push rod split and fragmented causing it to bind against the park pawl. Thanks for all your advice.
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2007 Chevrolet HHR LT 2.2L steering VIN: 3GNDA23D37
Thanks for the information. Can you remember the days that you could verify the complaint and actually test suspect components? With your help and a old tech assist file on delco's training site I found that calibration is not needed on the HHR. It is my under...
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2000 Oldsmobile Silhouette GL 3.4L Heater VIN: 1GHDX03E9Y
The heater core was restricting airflow. Replaced the heater core. The design of the heater box leaves alot to be desired. When set on cold the air leaves the fan, goes through the evaporater and directly out the vents. When set on hot the air has to go throug...
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1900 Other GM SLED 8.0L Cuts out VIN: 2121365948
TO EVERYONE THAT REPLIED- THANK YOU. I ENJOYED READING THE RESPONSES MORE THAN POSTING THE REQUEST. ALL SUGGESTIONS HAD A LOT OF THOUGHT AND USEFUL HELP. UTILIZED A LITTLE OF ALL RESPONSES TO TRY AND IMPROVE BUT AS SOME SAID- IT MAY BE OPERATING AS DESIGNED BU...
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