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Prev Professional Automotive Repair Technical Discussions for May 9, 2012
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Open Help Requests for GM
Help Request Answers
2003 Buick Regal LS 3.8L No Start VIN: 2G4WB52K33
hello all gm techs. could you please help me with sick buick i have in my shop. it came in with no starting issue. scaned pcm and bcm and found no dtcs. checked for fuel pressure and its good. checked spark and its good. checked for injector pulse and found no...
1995 Chevrolet K1500 5.7L Hesitation, Stall VIN: 2GCEK19K2S
i installed a used engine in this truck, had trouble with the starting right away,checked fuel pressure,4.6 psi. replaced pump,strainer and filter.started great and pressure was fine. drove 20 miles fine,after stoping tried to restart and had to hold throttle ...
2000 Chevrolet Express 3500 5.7L Power steering VIN: 1GBHG31R7Y
Month later this truck is back and has no assist at idle stopped. If you bring the RPMs up it seems to work but you can hear the pump struggling a little. This truck had hydra boost and it seems to be working OK. When driving it seems to steer funny. Like it i...
2001 Chevrolet Suburban 1500 5.3L MIL Lamp on VIN: 3GNFK16T81
Fighting code 1153 - lack of 02 sensor switching bank 2 sensor 1. Have replaced the 02 sensor - code came back in a day. swapped both upstream 02 sensors side to side. code 1153 still set for bank 2. Freeze frame data shows code setting 10 to 13 minutes after ... Trouble codes: P1153 (Insufficient switching 02 sensor 2-1)
2001 Chevrolet Suburban 1500 5.3L steering VIN: 3GNEC16T81
Chevrolet says hard steer to right is normal.I don't think so. These vehicles do not steer like this when new, so what is happening to them with higher miles causing this.If anyone has a fix please post it.I have no more parts left to replace to correct this c...
2003 Chevrolet Trailblazer North Face 4.2L #4 exhaust valve VIN: 1GNET16S43
This is the second time in six thousand miles since the original repair and the number 4 exhaust valve is burned out again. Any ideas besides a bad guide (replaced twice), bad valve (replaced twice). I am thinking it has to be in the camshaft. Your thoughts??
2003 Chevrolet Astro 4.3L Battery Light VIN: 1GCDL19X73
Okay here we go. I have this astro van in. Came on a hook as a no start. Replaced the starter starts right up. Then I noticed the battery light on. Tested alterneator output and it was 1 volt. Replaced the alternator, lights still on and alternator output is 2...
2005 Chevrolet Trailblazer EXT LS 4.2L vehicle speed sensor
PLEASE DON'T RESPOND IF YOU DON'T READ THIS POST IN IT'S ENTIRITY. I'm to my wit's end here guys, need some suggestions. OK, my boss purchased this vehicle with a bad trans. One of our mechanics replaced the trans, and my boss sold the vehicle. The customer b...
1999 GMC Sierra 1500 SLT 4.8L transmission VIN: 2GTEK19V6X
This Sierra had an intermittent failure where the battery light would come on, and gauges would fail. I found and isolated the remote starter/alarm as the culprit. Removed alarm and that condition no longer exists. The Trans condition is still present. The tru...
1991 Pontiac Firebird 3.1L No Start, Cuts out, Stall VIN: 1G2FS23T9M
this vehicle was brought to us form another shop and had already been to another one for before that. his original complaint was cutting out and stalling. when it got here that is what it did also. it would idle, and rev slowly to about 200 rpm. but if you rev... Trouble codes: 33 (Map sensor voltage high)
2004 Saturn Ion-3 2.2L Tcc VIN: 1G8AW12F84
We checked for codes and no codes. The trans has to get to about 160 degrees before it will surge. Then under light throttle between 10 to 20 mph it will buck until you step into it and tcc pressures will rise and it seems to engage. It will not surge if you a...

Fixes & Summaries for GM
Fix/Summary Answers
1971 Buick LeSabre 5.7L No Start VIN: 452391Y118
wow thank you for all the help from everyone i did all the checks and found out that the well plugs were leaking i decided to sell a new carb. cust. is happy...thank you again for sharing all your hard earned experiance.
1993 Buick Century Special 3.3L Surge, Misfire VIN: 1G4AG55N6P
Happy Wednesday to all, The final answer to this Buick was the MAF, we installed a reman unit and the car is down the road!!! Thanks to all who responded, IATN is the best!! Tim [...]
2005 Buick LaCrosse CXL 3.8L evap. system VIN: 2G4WD53225
thanks for the replies, turns out the vent valve was the problem. resmoked the system and started playing with the lines and sure enough got to the valve and just happen to bump it we seen a little wisp of smoke. replaced it and all is well. thanks again to AL...
2001 Chevrolet Malibu 3.1L No Start VIN: 1G1ND52J01
Well guys do I have egg on my face...The fix was obvious and i was looking for a problem fix.. The sensor at flywheel had been replaced... The sensor at crank had not... Once it was replaced the problem went away ..The code for oil press. circuit. when cleared... Trouble codes: P0336, P1189.
2004 Chevrolet Avalanche 1500 Z66 5.3L Transfer Case VIN: 3GNEK12T54
Vehicle went to gm dealer , had new seal replaced under warranty, ok so far.
2007 Chevrolet Tahoe LTZ 5.3L MIL Lamp on VIN: 1GNFK13067
We still have this vehicle. We've replaced the BCM and programmed it but it didn't fix it. We are looking at an IPC if we don't come up with anything else. I will get this thing fixed and post the fix. Thanks all! Trouble codes: P2135 (TPS Correlation), P0325 (Knock Sensor Circuit Bank 1), P0330 (Knock Sensor Circuit Bank 2).
2007 Chevrolet Silverado 1500 WT 5.3L Shifts VIN: 2GCEK13M77
Thanks to all that replied. As always, you were overwhelmingly right on target!! Broken sprag, very common problem I am learning. The transmission is being rebuilt as I write this, and the truck will be back on the road by tomorrow. Thanks again!!
2000 Pontiac Grand Prix SE 3.8L No Start, Stall VIN: 1G2WJ52K5Y
Thanks for all the help. It was the crank sensor. The harmonic balancer was fine. No codes for it and when it was running it read normal. Drove us crazy. Trouble codes: P1626, P1629, P1811.
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