How JustAnswer Works:
  • Ask an Expert
    Experts are full of valuable knowledge and are ready to help with any question. Credentials confirmed by a Fortune 500 verification firm.
  • Get a Professional Answer
    Via email, text message, or notification as you wait on our site.
    Ask follow up questions if you need to.
  • 100% Satisfaction Guarantee
    Rate the answer you receive.
Ask GM Tech (Cam) Your Own Question
GM Tech (Cam)
GM Tech (Cam), Chevy Technician
Category: Chevy
Satisfied Customers: 15201
Experience:  GM Grand Master Technician 2007. 14 years experience.
Type Your Chevy Question Here...
GM Tech (Cam) is online now
A new question is answered every 9 seconds

I replaced the motor, Now it will not start, 99 gmc c6500, I

Customer Question

I replaced the motor
JA: How many miles are on the car? Is it an automatic or a manual transmission?
Customer: Now it will not start
JA: What is the model/year of your Chevy?
Customer: 99 gmc c6500
JA: Are you fixing your vehicle yourself? What have you tried so far?
Customer: I replaced the motor with one that ran fine in the other truck now it wont start it turns 3 seconds then stops like it has a chip key but it dosent have a chipkey. no spark. it has fuel to rail but i think the comp shut off the injectors & spark. could that be from the old motor blowing a rod?
JA: Anything else you want the mechanic to know before I connect you?
Customer: no
Submitted: 10 months ago.
Category: Chevy
Expert:  Eric replied 10 months ago.


It still could be a security issue. When you turn the key to the on position, is there a security light that comes on the dash?

If so, does it blink on and off, go off within 10 seconds, or stay on as long as key is in on position?

Customer: replied 10 months ago.
I just double checked there is no security light comming on at all.
service parking brake, check engine, & change oil lights come on and stay on.
here is a strange box mounted by the drivers feet. it's black about 8"x8" it has a 2 digit readout &a loud alarm that sounds when & tun the key on. it apears to be factory wired to the truck. I've never seen this before & i've worked on & driven a lot of trucks.
Expert:  Eric replied 10 months ago.


hmmm, I am not familiar with that box either and sounds like it is related to the no start. Let me opt out and see if another expert is familiar with it and its function

Customer: replied 10 months ago.
How do I set the timming on a 99 gmc 454 vortec with coil over plug setup.
The distributor is only used as a cam possition sensor. there's no pointer or wires to anign. I know how to get it to top dead center but how do I know what position to put the distributor in?