2004 Chevy Silverado Shaking and pulsing while driving

Tiny
RDSPIKE1
  • MEMBER
  • 2004 CHEVROLET SILVERADO
  • V8
  • 4WD
  • AUTOMATIC
  • 52,300 MILES
I have a 2004 Silverado extracab w/ 52000. Recently, after the vehicle has warmed up, it shakes/pulses (like going over a rumble strip) between 40 and 55 mph. It goes away if let off the gas or give it the gas to accelerate. Acceleration is fine, I even punched it from a start to 60mph no problem. In park I put it thru the rpm range with no problem. The engine light is not on/its not sending codes and my mechanic says its not rotors or suspension and is stumped!
Help! Thanks.
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Saturday, December 1st, 2007 AT 1:56 PM

1 Reply

Tiny
PEAR69
  • MEMBER
Check for sticking exaust valve. Change fuel filter. Check for clogged cat. Converter. Clean injectors. Check for vaccum leak.
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Sunday, December 2nd, 2007 AT 9:27 AM

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