>I have a 95 gmc k2500 4x4, w/6.5L L65 engine,187k miles, injection pump and
>computer were replaced in feb 2003, recently the shifts have become stacked,
>very quickly moving through 1st to 3rd gear....along with this when i let off
>the throttle slightly the rpms drop quickly several hundred rpm, same with
>cruise control on, I can pull up a hill at 70mph with no problems but as
soon as
>i come over the grade and start back down the throttle(on cruise control)
>drops very choppy , then accels, then drops(within a second or two...) and
will
>keep doing this until it needs to accel regularly again....
>took it to a tranny shop, then said they were getting bad data from the
>throttle(electronic) and couldn't diagnose it further until that was
corrected, i
>replaced the APP($300) but it still does it... paper clip to check codes only shows 12, no service engine or service throttle lights have come on at all, rpms are 2500 at 65mph, 4.10 gears, 245-75-16 tires,. This summer I had the timing reset and had it on a tech 2 scanner and it was indicating low range
>engaged in the various data screens, but no computer codes were recorded.....could a sensor indicating low range
change the
>throttle response and shifting?? the engine sounds much louder at 65-70mph also...still plenty of power snowplowing, pulling etc. for any help you can give me or refer
>me to, thanks, steve
>ff43sc@aol.com

[ 01-01-2004, 06:51 AM: Message edited by: ff43sc ]