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  1. #1

    Default Increasing HP on a '98 Suburban

    OK, one more thread and then I am going to quit for the day. Got a '98 'Burb with the 5.7. Occasionally I pull a car hauler or other utility trailer and, although it gets around ok on flat roads, it really loses power on the hills. What would you suggest to increase the power of this thing....I thought about selling it for something more suitable for towing, but I would prefer not to. I also do not want to mess up my mileage...I got 15 mpg on a 400 mile trip pulling a car hauler with a small car on it. Of course, I was really taking it easy...

  2. #2
    TrailLeadr's Avatar
    Join Date
    Jun 2005
    Coventry, Rhode Island


    Full tune up, and oil change is a great place to start. Switching to synthetics couldn't hurt. Easiest hp mods are less restrictive air filter, and or headers. Neither will adversely affect mileage. You could opt for a hypertech tuner to adjust the pcm for a little more power, and adjust shifting for better economy at the same time.
    Rhode Island

  3. #3

  4. #4


    If you like your gas mileage live with the horsepower you have, maybe a tuneup. Anything else is gonna cost you at the pumps.

  5. #5


    Yeah, I agree. If you only haul occasionally, then I would live with the decreased power while hauling for better economy when not hauing.

    Now, if you haul a lot, then that's a different story.

    10 Chevy Traverse LT AWD
    02 Chevy Trailblazer LS (110K+ miles - loaded except for 4WD - WRECKED!)
    99 Chevy Cavalier LS (105K+ miles - commuter car)
    78 Chevy Suburban Silverado (454, 3/4 ton)
    62 GMC 3/4 ton Pickup (350 police interceptor)

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