Our 2003 chevy silverado is cranking slow in the mornings and during the day like a bad battery, but it is a new batery that we had chedcked. we also can be driving down the road and we get the message reduce engine speed and it will not take gas what do you think it can be we also had a starter draw done and it tested good

SOURCE: 235k miles. cut off one time going down road,

I have seen crank sensors go and leave no codes, but, likely the fuel pump is going away...they get hot and seize, then cool down and work again. I would not replace either without proper testing only because parts are expensive and there are other heat sensitive components in there. (coil etc) Be aware that it will check out good if it is running right while tests are being done.

Testimonial: "It cranks when hot and has sit for a while, when it would not crank. If you now think it might be crank sensor, how do how do I get to it. "

SOURCE: 2003 Chevy Silverado 2500HD 6.0 liter engine.

try to jump the starter selinoid

SOURCE: My 2006 Chevy Silverado 2500

"im sure that you have already checked your battery cables to make sure that they are not coroded, if they are then, they need cleaning, " if battery cables were ok, then check the cable connections to the starter to make sure that they are tight , also as long as your charging light wasn't on, alternator should be fine, then i would remove the starter and take it to a auto parts store and have it checked out, "sounds like a starter armature, and possibly the solenoid is bad too, this way you will know if the starter is bad.

SOURCE: I have a 1995 chevy

check the wires on the starter,,the one going to the battery

Stephen

• 21873 Answers
• Posted on Dec 08, 2012

SOURCE: 2003 Chevy silverado 2500!hd reduce engine speed

Have you checked the computer for trouble codes yet ?