# 2008 Chevrolet Silverado 1500 stumbles in cruise control **URL:** \ **Category:** Maintenance/Repairs\ **Tags:** chevrolet, silverado1500\ **Created:** [May 6, 2019, 1:53pm UTC](https://community.cartalk.com/t/2008-chevrolet-silverado-1500-stumbles-in-cruise-control/139874 "2019-05-06T13:53:20Z")\ **Posts on this page:** 6\ **Page:** 1
**Author:** ![HenryPatton](https://avatars.discourse-cdn.com/v4/letter/h/ed655f/32.png) [@HenryPatton](https://community.cartalk.com/u/HenryPatton)\ **Post date:** [May 6, 2019, 1:53pm UTC](https://community.cartalk.com/t/2008-chevrolet-silverado-1500-stumbles-in-cruise-control/139874/1 "2019-05-06T13:53:20Z")
2008 Silverado 5.3 Engine. While driving with Cruise Control on, it stumbles, skips or something going up a medium hill. It will downshift two times and the RMP jumps to nearly 4000 RMP. Gas mileage has drooped. But sometimes it runs better than other times. Thanks ---
**Author:** ![Mustangman](https://sea1.discourse-cdn.com/cartalk/user_avatar/community.cartalk.com/mustangman/32/44130_2.png) [@Mustangman](https://community.cartalk.com/u/Mustangman)\ **Post date:** [May 6, 2019, 2:20pm UTC](https://community.cartalk.com/t/2008-chevrolet-silverado-1500-stumbles-in-cruise-control/139874/2 "2019-05-06T14:20:58Z")
Is the check engine light on? How many miles on the engine? ---
**Author:** ![ledhed75](https://avatars.discourse-cdn.com/v4/letter/l/f6c823/32.png) [@ledhed75](https://community.cartalk.com/u/ledhed75)\ **Post date:** [May 6, 2019, 3:34pm UTC](https://community.cartalk.com/t/2008-chevrolet-silverado-1500-stumbles-in-cruise-control/139874/3 "2019-05-06T15:34:16Z")
How’s the transmission fluid? ---
**Author:** ![HenryPatton](https://avatars.discourse-cdn.com/v4/letter/h/ed655f/32.png) [@HenryPatton](https://community.cartalk.com/u/HenryPatton)\ **Post date:** [May 6, 2019, 9:32pm UTC](https://community.cartalk.com/t/2008-chevrolet-silverado-1500-stumbles-in-cruise-control/139874/4 "2019-05-06T21:32:01Z")
Transmission fluid is good. No engine light on. 260,000 mile on truck. I have changed \> fuel pump plugs and a bunch of sensors ---
**Author:** ![Johnny\_Dreddz](https://avatars.discourse-cdn.com/v4/letter/j/c5a1d2/32.png) [@Johnny\_Dreddz](https://community.cartalk.com/u/Johnny_Dreddz)\ **Post date:** [May 6, 2019, 10:41pm UTC](https://community.cartalk.com/t/2008-chevrolet-silverado-1500-stumbles-in-cruise-control/139874/5 "2019-05-06T22:41:12Z")
Which sensors did you change? If you don’t mind me askin… ---
**Author:** ![HenryPatton](https://avatars.discourse-cdn.com/v4/letter/h/ed655f/32.png) [@HenryPatton](https://community.cartalk.com/u/HenryPatton)\ **Post date:** [May 7, 2019, 11:21am UTC](https://community.cartalk.com/t/2008-chevrolet-silverado-1500-stumbles-in-cruise-control/139874/6 "2019-05-07T11:21:50Z")
all oxygen sensors. fuel pressure sensor. crankshaft, temp sensor. thanks