Question about 1999 Chevrolet Silverado 1500
Yesterday my 99 Silverado would not shift into overdrive. Before that it would surge at 50 mph but when that would happen I just down shifted to 3rd but now yesterday it worked fine until the last time I drove it, it would not shift into overdrive just like it was in tow haul mode. I read that there is a transgo valve body kit that would fix the surging problem and supposedly a fuse for the second but I am not finding the fuse for overdrive. Thanks for your help. The truck has a 5.3L with 235000 miles its been a great truck this is the first major issue. Original engine and tranny.
Have a 1998 K3500 silverado 4x4 with 454 motor and 4L80E transmission. I can not get over 55 or 60 mph. At that speed the transmission down shifts from 4th (OD) to 3rd. The speedometer also drifts from about 50 to 65. If I try to speed up it will down shift to 3rd. I have replaced the VSS on the trasfer case. Is there another speed sensor somewhere? Or could it be the TPS? The truck drives and shift normal up to this point. where should i look next. thanks
Posted on Dec 27, 2011
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Posted on Jan 02, 2017
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