1997 Chevy Blazer 148,000 miles. My front wheels will not engage in 4hi or 4lo. The front drive shaft will engage and the vacuum actuator moves but is sticky and does not move smoothly. The front diff was low on fluid so I drained and refilled. My first guess wold be the actuator. What does the switch on the front diff do? Also, 90% of the time all lights (head, interior, dash, fuel gage movement) pulsate. It gets worse with increase of RPM. It has done this for years. Could it be the voltage regulator?
Tuesday, December 19th, 2006 AT 6:01 AM