2006 GMC Sierra gmc sierra 2500

2006 GMC SIERRA
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JOSE GOMEZ
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Engine Mechanical problem
2006 GMC Sierra V8 Automatic

Hi there. I own a 2006 gmc sierra 2500 V8 6.0 eng. with about 170,000 miles,the transmission is shifting very rough, the gears kick in very hard. I replaced the transmission fluid and and filter and it did not improve at all. Also this past weekend I came back from work and it was running, but the next day when I tried to start it it would not start, I replaced the ignition relay and it started but it stalled again after 20 minutes of use, I tried to restart it and it wouldn't, now it starts and runs for about 1 minute and it stalls again and sometimes it doesn't even crank.
Dec 26, 2009 at 11:25 PM
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RASMATAZ
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Check and test the ignition switch sounds like when it heats up it breaks contact-
Dec 27, 2009 at 2:35 AM