The power door lock actuators may become slow to operate or stop working completely and require replacement.Google+
Car Problem Reports
Chevrolet Suburban 1500 Power Door Lock Actuators May Fail
Chevrolet Suburban 1500 Problem
Average Mileage: 81,179 mi (18,900 mi - 222,000 mi)
Visitor, 1999 Chevrolet Suburban 1500, 121,000 mi
Visitor, 2008 Chevrolet Suburban 1500, 42,000 mi
Back passenger door lock failed. Not repaired due to cost.
Visitor, 2002 Chevrolet Suburban 1500, 190,000 mi
Door Locks trying to lock over and over going down road dome light won't shut off alarm won't set with out going off.
Visitor, 2009 Chevrolet Suburban 1500, 80,000 mi
Back passenger door will not actuate
Visitor, 2008 Chevrolet Suburban 1500, 128,000 mi
Rear door both sides power door locks don't actuate. Originally fixed under warranty, failed again.
Visitor, 2008 Chevrolet Suburban 1500, 61,000 mi
Drivers side power door lock no longer has enough power to open with remote. Must be manually unlocked and manually pushed down to lock. Still need to fix this.
Visitor, 2008 Chevrolet Suburban 1500, 54,230 mi
Both rear door locks and windows do not work. Windows only work from the driver side controls.
Visitor, 2006 Chevrolet Suburban 1500, 100,000 mi
Read hatch doors will not lock. Priced parts to fix it at Chevy Dealer and they quoted over $500.00 to fix. Told me it takes the entire door lock mechanism. Not going to spend that kind of $$ on a vehicle that now has 135,000 miles. Disappointed in Nebraska
Rear right door locks not working
Visitor, 2008 Chevrolet Suburban 1500, 73,000 mi
door locks fail, replaced at 40k and now again.