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GMC Envoy problems and GMC Envoy repair histories -- car repair descriptions reported ... by car, to see how many repairs each car required and where the car is located. ... 5.3L V8; 2006 291-horsepower 4.2L I6; 2005 275-horsepower 4.2L I6; 2004 ... Advised by OnStar not to drive and have it towed. ---------------------------------------------- galletto 1260
Horsepower gains for 5.3 L or 4.8 L V8 Cold air intake. (5-15 horsepower)Such as Volant, K&N, Airraid. Chip, programmer, or a custom tune.(10-15 horsepower) Exhaust(Realisitcally 1-5 horsepower) Headers(5ish horsepower)
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