Question about Chevrolet Suburban 1500

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I HAVE A 2003 CHEVY SUBURBAN WITH ONLY 11K MILES! IT SAT FOR ALMOST 6 YEARS IN HAWAII THEN I HAD IT SHIPPED HOME. IT WAS ALSO IN AN ACIDENT BUT WAS FIXED. I AM GETTING RANDOM MISFIRE CODES, I REPLACED UPSTREAM O2 SENSOR, PLUGS, WIRES, FUEL FILTER, FUEL PUMP. AND BANK 2 SPARK PLUGS WERE FOULED W/ CARBON DEPOSITS, BEFORE I REPLACE THEM, IT IDLES ROUGH BUT ACCELERATES FINE. WHAT IS MY FIX FOR THIS PROBLEM

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Change all fluids, drain gas tank fill and add fuel stabilizer

Posted on Sep 12, 2009

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Posted on Jan 02, 2017

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I have a 2003 Chevrolet suburban when I start it up the transmission shifts smoothly but once I drive about 50 miles or more the tranny starts to slip please help


If the vehicle has more than 90,000 miles on it the transmission should be rebuilt. Chevy used the 4l60E transmission in Suburbans and it is not quite strong enough.A good rebuild will change all clutchs and plates along with the sun gear and cage.Also all electronic modules.I had mine rebuilt at 125,000 and afterwards pu an additional 200,000 on it without any slippage.

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Nov 25, 2009 | 2003 Chevrolet Suburban 1500

1 Answer

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07187C This is a bulletin for special coverage on the instrument cluster. Have the dealership check your vin number and mileage. There is no cost to you if you are under the 7 years or 70,000 miles range.

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It might fix the problem but you may also have a shift sensor that is starting to go bad as well take you suburban to autozone or an o'reillys if you have one of those auto parts stores near you and they can do a scan on all the sensors to tell you if your vehicle is showing any problems with any of your sensors I hope this helps you out.

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1 Answer

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eather it is the alatanoter over heating or the coil probly the coil i would beleave

Dec 14, 2008 | 2003 Chevrolet Suburban 1500

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