Question about 1999 GMC Suburban

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What is the best cap and rotor for my 1999 Suburban? I have been told AC Delco is the only way to go, what do you think.

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YES AC DELCO IS THE BEST QUALITY AT THE BEST PRICE, UNLESS YOU HAVE OVER 100,000 MILES ON THIS TRUCK I WILL SAY REPLACING THE CAP AND ROTOR IS A WASTE OF MONEY

Posted on Apr 26, 2010

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My 1999 suburban is missfiring on cylinder one, changed new plug, cap & rotor, wires


You seem to have covered almost everything electrical. That leaves mechanical. Either valves sticking, frozen, or spring, cam broken. Fuel line or injector to that cylinder is the only other item I can think of. Let me know how it works for you.

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Chevy express 1500 will n ot start, fuel pressure good 60 psi! The coil is sparking good! the engines turn over strong. it seem to do this whenever it rain!


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I have a 1999 chevy suburban 5.7 Vortech witch is starting to drive me nuts. The spark plug wires, and all around the ignition coil is arching. With this said the distributor, cap, rotor, plugs, wires, and...


Assuming none of the wires are crossed, AND you replaced the cap rotor wires with quality replacements (meaning AC Delco) then you may have a bad coil. Remove coil from dist cap if HEI and look for any signs of arcing such as blackened areas.

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1 Answer

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Stick with the AC Delco spark plugs. They give the best performance for the engine design.

Apr 21, 2010 | 1990 Chevrolet Suburban

1 Answer

What is the spark plug gap for a 1999 Suburban 5.7L usink NGK plugs?


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What do these trouble codes mean po306 cyclinder misfire detected .how do i fix the problem?


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You either have a bad spark plug wire or coil pack. The light gray color on plug is normal.

Sep 09, 2009 | 1999 Chevrolet Suburban

2 Answers

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try a different cap. try an ac delco part. common for after market one to do this miss problem. best of luck.

Aug 07, 2009 | 1999 GMC Suburban

1 Answer

My 2004 gmc envoy stalls when sitting at the light or idling to long


premium gas is a waste of money. domestically produced and sold cars are actually calibrated for econo gas. well, based on what you told me and the type of vehicle, i'd invest in some well-needed maintainence (COMPLETE tune up with AC Delco platinum plugs, fuel filter, air filter, pcv, cap and rotor) don't skimp on cap quality either- told ya -they're problem-prone. BUT with the "check gauges" light coming on, my bet is you're experiencing the warning signs of imminent fuel pump failure. gas gauge been bouncing or not reading accurately?

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1 Answer

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