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Prev Professional Automotive Repair Technical Discussions for September 29, 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
1996 Cadillac Seville STS 4.6L antitheft VIN: 1G6KY5294T
The car will run and then will die in three seconds a message on the dash says "antitheft system problem" and "car will not start" , but the car will start and dies on three seconds always.
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1971 Chevrolet Corvette 5.7L Excessive Emissions, No Start, Surge
Here we go. This is one a friend of mine is calling me in for. He has done a COMPLETE overhaul on this car. Started it about 10 years ago!!! The car is finally done. We rebuilt the original motor with all stock replacement components (this past spring). No "pe...
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1987 Chevrolet Caprice 5.0L Poor Idle Quality, Hesitation, Poor Fuel Economy, low pwr after third VIN: 1G1BU51H1H
thanks everyone this is my hell the cars repairs are done bye verious other shops i have always been blessed with attempting to adj out there repairs this time iam stumped car runs good off idle up too third gear than has no pwr and at times has very seveare s... Trouble codes: 43 (e s c spark control no light with code)
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1994 Chevrolet K2500 5.7L Poor Idle Quality, Misfire VIN: 1GCFK29K1R
truck has a miss at idel unpluge map miss will goaway .withe the vac line to the map pluged and map pluged in the miss will go away injetor pulse will go to 2 mv map will read 4.5 volts full throtel truck will smoth out .remove and pluge egr no change at idel....
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1998 Chevrolet K1500 Suburban 5.7L shudder VIN: 3GNFK16R8W
I get a bad shudder or vibration on moderate load at about 60 mph it starts slow then build up to a bad vibration. yet if i get into it hard or let off it stops. my first instinct is transmission. any help apreciated thanks in advance. Trouble codes: P0300
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1998 Chevrolet S10 LS 2.2L Stalls VIN: 1GCCS1944W
Intermittent crank and/or cam sensor problems (P0335, P0341)over the two years . All circuits and wiring are testing fine. As for sensors, I have tried replacing one or the other and end up replacing both and redoing. At first it would fix the problem for 3 to...
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1999 Chevrolet Cavalier 2.2L Master Cylinder VIN: 3G1JC5247X
Inspected all 4 wheels. Lots of material on rear shoes; wheel cylinders ok. Replaced front brake pads / rotors and calipers[uneven wear each side]; cannot get fluid to rear wheels. No fluid coming out of abs controller lines. Does this sound like a master cyli...
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2000 Chevrolet Corvette 5.7L starter,radio VIN: 1G1YY32G5Y
Car was towed in as no start, steering wheel locked. Scanned for codes-none in eng,trans,abs. Airbag had U1000 class 2 comm, U1040 EBCM/EBTCM comm, U1064 BCM comm. I have a Modis. Could not communicate with BCM. Pin tested BCM. Powers and ground ok. Leaning to...
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2003 Chevrolet Monte Carlo SS 3.8L MIL Lamp on VIN: 2G1WX12K73
Takes approx 100-120 miles to set after 4 drive cycles it is pending drive cycles around 35 -50 mph various conditions no motor noise performance is good. Knock sensor code will pend and in freeze frame long term trim will be at +140 while short term is +1 egr... Trouble codes: P0327
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2006 Chevrolet Corvette Z06 7.0L no ecm communication VIN: 1G1YY26E16
Starting to pull my hair out on this one. This vette has no communication with ecm,all module have communication and data codes and the instrument and heads up module have no communication codes for ecm, ebcm and suspension.I have checked all power and ground ...
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2003 GMC Yukon XL 1500 SLT 5.3L Accessories VIN: 1GKFK16Z23
Vehicle was towed in because throttle was unresponsive-found codes p0120,p0220,p1516,p1518-found bulletin for updated software-installed software-vehicle drove out ok.Went to close drivers power window and whole vehicle went NUTS-windows and locks quit working...
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2003 GMC Yukon XL 1500 SLT 5.3L door locks
Hey guys, this is my first tech help post! Got this 03 yukon XL and customer came in with the door locks not working except for the drivers door. I checked everything and determined that all the lock actuators needed replacing. So we replaced all actuators and...
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2003 GMC Sierra 3500 6.6L Shift VIN: 1GTJK331X3
Truck has 4th gear only, pressures electrical connectors ok
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2005 GMC Canyon Z85 SL 3.5L radio and wipers VIN: 1GTCS19605
got a weird one here after the truck is shut off , you exit the vehicle the factory alarm may start to go off. also the radio comes on as do the wipers if they left on before you left the truck. this happened only one time for me and stopped on it's own. had m...
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2000 Pontiac Grand Am SE 2.4L MIL Lamp on VIN: 1G2NF52T5Y
Greetings fellow IATN Techs. I have this Grand Am that has came in 3 times in the last 6 weeks. Customers complaint is that the check engine light is on. When first diagnosed, using the Tech 2 scan tool, i commanded the Vent valve closed. With the smoke machin... Trouble codes: P0442 (Evap small leak detected)
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2005 Pontiac G6 3.5L No Start VIN: 12T3645738
intermitant no start/no crank when problem happens have no communication with pcm and bcm sets no comm code with pcm and another code for no comm with steering modual. sorry at home and dont have code #'s. Also noticed odometer reads ERROR and radio reads STEE...
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Fixes & Summaries for GM
Fix/Summary Answers
1994 Chevrolet Lumina Euro 3.1L Poor Idle Quality VIN: 2G1WN59T5R
THANK YOU ALL FOR THE TECH HELP I HAVE ALREADY TRIED ALL OF THE INFO YOU HAVE SENT ME BEFORE I REQUESTED HELP, THE CUSTOMER HAS DECIDED TO SELL THE VEHICLE AS IS AND LET SOMEONE ELSE FIGURE IT OUT. THANKS AGAIN PAT. Trouble codes: 35 (Iac).
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1997 Chevrolet S10 2.2L 3-4 shift/3-2 shift VIN: 1GCCS1444V
Well I fixed this one yesterday. Sometimes plain-ol common sense prevails over hi-tech diagnostic equipment. Turned out to be the forward sprag was locked-up, as I reasoned by looking at the powerflow chart. I left out several details and test results in my or...
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2003 Chevrolet SSR 5.3L Accessories VIN: 1GCES14P43
thanks to all that replied the problem was the latch the switch was ok but the guide pin would not push on the switch because of play in the latch thanks again jeff
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2006 Chevrolet Silverado 2500 HD LS 6.0L Reduced power VIN: 1GCHC29U26
Thanks for all the responses, found a poor connection when the throttle body pigtail was replaced. Also remoeved and cleaned all the grounds on the engine even above the transmission. So far so good. Thanks again. Trouble codes: P0120 (Tps position sensor 1 circuit), P2135 (Throttle position 1-2 correlation).
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2003 Pontiac Aztek 3.4L rear brakes VIN: 3G7DA03E23
sorry for the delay in closing. we are waiting for the vehicle to return. thanks for the replies. the only suggestion that has not bee tried already is hardware. we have a GM hardware kit for it when it comes back. heres hoping!!
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