Engine Mechanical problem
1998 Other GMC Models V8 Four Wheel Drive Automatic 175000 miles
this is a 98 suburban: after using off and on all day, all of sudden when we tried to start the vehicle it wouldn't quite catch and then just started clicking. We brought in the starter and the solenoid for testing and they checked out fine, so we replaced the starter relay but we still have no success, just a clicking. There seems to be full power (lights, etc) and we can put a wrench on the flywheel and still turn it. Not sure what else to check, any help would be appreciated. Thanks.