Question about 1997 Chevrolet C1500

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I have a 1997 reg cab silverado c 1500 that I had the ecm replaced in. The truck ran fine but shifted hard. I had the transmission rebuilt by a reputable mechanic who specializes in 4L60E transmissions. I drove the truck around on both highway and city streets for 2 days with no event. It just started to lose power and would not shift smoothly through the gears. When pressing accelerator the RPM's would not increase, nor would it accelerate. The service engine light came on. All o2 sensors have been changed. It has 135000 miles on the engine. Could I have a bad catalytic convertor or am I looking at another transmission problem. It has had a complete tunup and all ignition components have been replaced.

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I would check the fuel pressure and replace the fuel filter, if it hasn't been done for a while, also check the air filter.

Posted on Jun 07, 2010

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