Skip the auto shop - Our mechanics make house calls

Q: Starter circuit problem and will not crank. 2000 GMC Savana 2500

asked by on

My van is having a starter circuit problem. While I was filling the tank at a gas station, my van would not start. I had to push it away from the pumps and it then started. When I got home and turned it off, it would not restart. I have checked the battery and failed load test and replaced, but no change. I then followed the circuit to PnP switch but no signal through in park; bypassed to verify and replaced the switch. I found a bad starter relay and replaced it. Still no change. Then, I checked the starter signal and I do now have a signal but the van still will not crank. I removed the starter. Except for worn brushes, the starter was fine but I went ahead and replaced it. It will now kick the starter, but still will not crank. I have checked all fuse block power and all is fine there. The battery has full power and it also passes a load test and a visual inspection of the wiring. There are no breaks and no corrosion. In the starting circuit, all components checked out okay. I tried a test jump at the starter to bypass any other possible problems, but the van still will not crank over. The starter engaging can be heard, but it will not crank. It did start twice, but not cranking over. I also inspected the ground from the battery to the the engine block and braided strap to frame. Except for some road dust, it seems dry and no sign of corrosion. Without my van I am losing income, so could you please tell me what you think I need to do next to fix my vehicle. Thanks.

A: It sounds like the main battery lead to the...

It sounds like the main battery lead to the starter is not suppling enough power to turn the starter. The way to test this is to use a multimeter and check the power cable (red one) with meter set to 20 volt scale. The red meter lead on the battery positive post and negative lead on the big cable connection on the starter. Try to crank the engine and you should not see more than .2 volts or 2/10 of a volt on the meter. If you do, then the cable is bad.

If the test is okay, then do the same with the negative cable from the battery negative terminal to the engine ground. If either test shows more than 2/10 of a volt, then the cable is bad and needs to be replaced or have the connection cleaned. Most of the time it is the connections at the battery to the cable. This test is called a voltage drop test.

If you need help having this checked, a qualified professional, like one from YourMechanic, can come to your car's location to diagnose the starting problem and assist you with repairs.

Was this answer helpful?

Need advice from certified mechanic? Get help now!

Over 1000 mechanics are ready to answer your question.
The statements expressed above are only for informational purposes and should be independently verified. Please see our terms of service for more details

Ask a Mechanic
(100% Free)

Have a car question? Get free advice from our top-rated mechanics.

Ask A Mechanic
Over 10,000 questions answered!

Get an instant quote for your car

Our certified mechanics come to you ・Backed by 12-month, 12,000-mile guarantee・Save up to 30%

Get a quote

What others are asking

Q: accidentally hooked up jumper cables backwards. No there is no spark on plugs and the fuel pump is running with the engine off.

Hello - the engine management computer controls the fuel pump (through a relay). The lack of spark may be related to a failed crankshaft position sensor, or possibly one or more of the coil packs. Failure of these will yield...

Q: Which GM pick up rear end has posi, disc brakes and will match my 67 measurements?

Hi there. The axle from a 2001 Chevrolet Camaro should fit your 67 GMC. The axle is about the width of your original axle and it has disc brakes with the posi loc traction control in the differential. If you...

Q: Every time I accelerate I hear air either being sucked in or blown out from somewhere under the hood.

Hello. Rushing air noises during acceleration could be considered a normal part of operation. Even more so with high displacement engines, that rapidly ingest and move a lot of air and gases both through the intake and exhaust systems. If...

Related articles

How Long Does a Heater Control Valve Last?
Keeping the right amount of coolant in a car is essential in keeping the engine at the right temperature. Failing to have the right amount of coolant or even bad elements...
How Much Does a Mechanic Make in Vermont?
Automotive technician jobs in Vermont have an average mechanic salary of $37k, with some mechanics earning a salary of $53k.
P2103 OBD-II Trouble Code: Throttle Actuator Control Motor Circuit High
P2103 means there is a fault with the throttle actuator control motor circuit, likely due to a defective electrical component or part.