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  1. #1

    Default 1999 gmc suburban - Runs rough and hard to get going

    Bought a burb, we have had it about 4 months, its having problems. It acts like it gets no gas sometimes and has a hard time getting going and runs rough. Replaced fuel filter and ignition module. Still acting up. Any ideas???


  2. #2


    Welcome to the club, it's great to have you aboard. I would replace the plugs and wires and see how that does. Good luck man.

    2002 Chevrolet Silverado Extended Cab SportSide: See Mods in My Garage

  3. #3


    Welcome to the Club
    99 Gmc Sonoma SL 4.3L 4x4 Reg Cab Long Bed

  4. #4


    Is the check engine light coming on? If so, go to the local auto parts store and get the codes pulled.
    How many miles on it?
    You can check plug wires by misting water at night in the engine compartment with it running and watch for any visible sparks (mis-fires). I'd do that before replacing. If replacing the plus make sure to use AC Delco.
    Bad O2 sensors (upstream) can wreak havoc.
    Keep us updated and welcome!
    Current Rides: |99 Chevy Suburban- the family truckster |93 Lincoln Town Car- 250K miles & still churning -now a fan of the Panther platform |95 BMW 325is coupe- Wheeee!
    Former GM cars: |78 Suburban 454 |71 Buick Electra 225 (deuce & a quarter) |75 Monte Carlo- 400SB- heaviest doors GM every made |70 Impala coupe- my 1st car

  5. #5


    do a vacuum leak check
    seafoam the intake
    clean the TBI
    upgrade the plugs, cap, rotor, and coil.

    that will get you started
    Gas was $1.83 when Obama took office.....

  6. #6

    mfleetwood's Avatar
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    Jul 2010
    Denver, CO
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    Welcome to the Club!!!

    I moved your thread here and changed your title slightly to match your topic. This will help in getting you more responses opinions.

    Mike (Denver, CO) - 2008 Sierra 1500 Z71 SLE 5.3L 4WD

    SUSPENSION: Rancho 4" Suspension Lift; Rancho RS9000XL Shocks; Rancho Skid Plates; Rancho MyRide Wireless Shock Controller;
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