# 08 Silverado 1500 cranks but won’t start **URL:** \ **Category:** Maintenance/Repairs\ **Tags:** chevrolet, 1500\ **Created:** [August 2, 2021, 12:52am UTC](https://community.cartalk.com/t/08-silverado-1500-cranks-but-won-t-start/178439 "2021-08-02T00:52:20Z")\ **Posts on this page:** 9\ **Page:** 1
**Author:** ![nicoled29](https://avatars.discourse-cdn.com/v4/letter/n/b19c9b/32.png) [@nicoled29](https://community.cartalk.com/u/nicoled29)\ **Post date:** [August 2, 2021, 12:52am UTC](https://community.cartalk.com/t/08-silverado-1500-cranks-but-won-t-start/178439/1 "2021-08-02T00:52:20Z")
Went over a huge bump and the entire dash lit up and stayed that way until I got home. After that, the truck wouldn’t start again. It cranks but doesn’t start. I can, however, get it started by commanding it on with a scan tool. So far, I’ve replaced: -Igniton switch -ECM -Fuel Pump -Spark Plugs -Fuel Pump Control Module -Battery No further codes or errors are showing with one exception: impact sensors. (Which are cracked in half) I’m not sure if for some reason that may be part of the issue but I doubt it. I’m hoping for some advice as I’ve really run out of ideas from here. Thanks in advance! ---
**Author:** ![Tester](https://sea1.discourse-cdn.com/cartalk/user_avatar/community.cartalk.com/tester/32/15976_2.png) [@Tester](https://community.cartalk.com/u/Tester)\ **Post date:** [August 2, 2021, 12:54am UTC](https://community.cartalk.com/t/08-silverado-1500-cranks-but-won-t-start/178439/2 "2021-08-02T00:54:52Z")
Do you see a crank sensor signal on your scanner while cranking the engine? Tester ---
**Author:** ![nicoled29](https://avatars.discourse-cdn.com/v4/letter/n/b19c9b/32.png) [@nicoled29](https://community.cartalk.com/u/nicoled29)\ **Post date:** [August 2, 2021, 3:12am UTC](https://community.cartalk.com/t/08-silverado-1500-cranks-but-won-t-start/178439/4 "2021-08-02T03:12:19Z")
When cranking I am getting an RPM reading ---
**Author:** ![George\_San\_Jose1](https://avatars.discourse-cdn.com/v4/letter/g/e5b9ba/32.png) [@George\_San\_Jose1](https://community.cartalk.com/u/George_San_Jose1)\ **Post date:** [August 2, 2021, 11:20pm UTC](https://community.cartalk.com/t/08-silverado-1500-cranks-but-won-t-start/178439/5 "2021-08-02T23:20:22Z")
Maybe if the computer senses a severe impact (e.g. from the impact sensor) it automatically turns off the fuel pump. To minimize the chance of a fire after a crash. A cranks ok but won’t start condition is usually either no-spark, or no-fuel. Are you getting a visible spark at a spark plug during cranking? Is the fuel pump running? ---
**Author:** ![oldtimer-11](https://avatars.discourse-cdn.com/v4/letter/o/e79b87/32.png) [@oldtimer-11](https://community.cartalk.com/u/oldtimer-11)\ **Post date:** [August 3, 2021, 6:29am UTC](https://community.cartalk.com/t/08-silverado-1500-cranks-but-won-t-start/178439/6 "2021-08-03T06:29:24Z")
Why would you replace all those unrelated parts before finding out WHY your car won’t start? I don’t know my way around Corvettes and never had or worked on a car with Impact sensors, but If I had your situation, I would have made the choice of 3 options. Replace the impact sensors or find out what the consequences of cract impact sensors are or take the car to a mechanic that knows. Your car is trying to tell you something, why aren’t you listening? Why did you not determine if you have fuel or spark before replacing parts? ---
**Author:** ![George\_San\_Jose1](https://avatars.discourse-cdn.com/v4/letter/g/e5b9ba/32.png) [@George\_San\_Jose1](https://community.cartalk.com/u/George_San_Jose1)\ **Post date:** [August 3, 2021, 11:57pm UTC](https://community.cartalk.com/t/08-silverado-1500-cranks-but-won-t-start/178439/7 "2021-08-03T23:57:06Z")
> [@oldtimer-11](#): > > I don’t know my way around Corvettes Just curious, why do you think OP’s vehicle is a Corvette? The post title references an 08 Silverado. Am I missing something? ---
**Author:** ![oldtimer-11](https://avatars.discourse-cdn.com/v4/letter/o/e79b87/32.png) [@oldtimer-11](https://community.cartalk.com/u/oldtimer-11)\ **Post date:** [August 4, 2021, 1:59am UTC](https://community.cartalk.com/t/08-silverado-1500-cranks-but-won-t-start/178439/8 "2021-08-04T01:59:41Z")
Re-reading the posts, I have no Idea where I got that from. All I can say is all Chevies are much alike4 to me. I owned one and I will never own another. There was one that made me smile though. I was visiting some relatives in East LA 30myears ago when I saw a l;owered mid 70s Chevy. Lettering in the back window said TCHEBBIE! TSHARP1 ---
**Author:** ![Cougar](https://sea1.discourse-cdn.com/cartalk/user_avatar/community.cartalk.com/cougar/32/21348_2.png) [@Cougar](https://community.cartalk.com/u/Cougar)\ **Post date:** [August 5, 2021, 2:08pm UTC](https://community.cartalk.com/t/08-silverado-1500-cranks-but-won-t-start/178439/9 "2021-08-05T14:08:13Z")
I suggest you verify that the plugs are firing when you crank the engine. If that is good then try spaying a little starter fluid into the intake and see if that makes the engine fire up. The results of those tests should tell you what needs to be looked at. ---
**Author:** ![eddo](https://sea1.discourse-cdn.com/cartalk/user_avatar/community.cartalk.com/eddo/32/2594_2.png) [@eddo](https://community.cartalk.com/u/eddo)\ **Post date:** [August 6, 2021, 6:38pm UTC](https://community.cartalk.com/t/08-silverado-1500-cranks-but-won-t-start/178439/10 "2021-08-06T18:38:26Z")
> [@nicoled29](#): > > I can, however, get it started by commanding it on with a scan tool. What are you commanding on with the scan tool?