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Prev Professional Automotive Repair Technical Discussions for August 14, 2010
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Open Help Requests for GM
Help Request Answers
1990 Buick LeSabre 3.8L Poor Idle Quality VIN: 1G4HR54C4L
all computer inputs sem to be in spec. find no vac leaks r&r intake hoping gasket was bad . seemed to be ok. air intake is clean& closed i just have asnapon brick to test with thank you in advance for your help
1997 Chevrolet Blazer LS 4.3L Excessive Emissions, Poor Idle Quality VIN: IGNDT13W5V
All was running great after previous repairs,, just started running rough,, I removed EGR and cleaned pintle area still rough,, I noticed fuel cell value at idle is 17, off idle drops to 2 then progressively goes up with throttle. is this normal at idle FT c...
1999 Chevrolet Express 2500 5.7L No Crank VIN: 1GAGG25RX1
BLOWES 40 AMP IGNITION FUSE INTERMITNLY CAN GO For DAYS WITH OUT BLOWING FUSE. Van is never runing when fuse blowes when customer starts van it blowes. already tried ignition switch still blowes fuse. Tried stater also still came back with fuse burnt.I hope so...
2009 Chevrolet Impala LT 3.5L Air Bag system VIN: 2G1WB57K39
When this car was wrecked, it hit a metal sign post head on, wiped out the Front End Assy...and then sign fell on roof and deck, ruined them. Air bags never deployed (has side curtain bags, seat bags, and front bags), and should have. Rebuilt the car, and the ...
2002 GMC Envoy SLT 4.2L electric windows, gauges VIN: 1GKDT13S52
We bought this Envoy from an auction, had been there for about a month and battery was totaly dead, took a well charged battery and replaced orignal and car started and ran OK, drove 60 miles home, but we could NOT get the windows down and AC did not work(90 d...
2004 GMC Envoy SLT 4.2L Mechanical VIN: 1GKDT13S64
hi techs,wierd one here.let vehicle sit afew hours,then startup and encoder motor sounds like a vacuum cleaner for 30 sec. or so.truck does move when happening.did have c0327 in history.i installed new encoder motor,still happens.switches in all positionns,tra...

Fixes & Summaries for GM
Fix/Summary Answers
1998 Buick Century Custom 3.1L Poor Fuel Economy VIN: 2G4WS52M4W
thanks to all who responded. sorry for the long delay in response to all suggestions. customers daughter wrecked their other car and needed his buick back regaurdless of poor fuel economy. however his gas milage has gone up from 16 mpg to 21mpg(according to cu...
2000 Cadillac Eldorado ETC 4.6L b2471 VIN: 1C6ET1296Y
Thank you for all replys and help. The problem turn out to be there is no power at orange wire, in which is main power to courtesy and many other lighting devices, so there is open circuit right after 10A fuse; added seperated power to the orange wire so that ...
2000 Cadillac DeVille 4.6L hvac VIN: 1GEEH90Y0Y
We have seen low freon charge several times causing this same concern, we had verified the proper amount of freon was in the vehicle, the initial thought was there was a problem with the air delivery. The correction for the concern was a restricted orfice tub...
2000 Chevrolet C3500 7.4L Stall VIN: 1GBKC34J6Y
I put an AC Delco fuel pump in this truck (the one in tank) and it doesn't whine at all any more. Before, at best, it would just be noisy without the pulses, but now it's just plain quiet! It idled outside my shop all day yesterday and never stalled or ran bad...
2004 Chevrolet Tahoe LS 4.8L Poor Idle Quality, Hesitation, MIL Lamp on VIN: 1GNEK13V54
First, thanks for all of the great help everyone. This one was an exercise in frustration, for sure. I actually for test purposes switched (with jumpers) the TPS1 and TPS2 circuits with each other on the Throttle body, and the bogus return voltage switche... Trouble codes: P0120 (p2101-), P2101 (p2135-), P2135.
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