1999 GMC Sierra 2500 Consumer Reviews

Great Power with 6.0 liter

Written by: roy on 10/21/2005

Vehicle

1999 GMC Sierra 2500 2 Dr SL 4WD Extended Cab SB HD

Review

ABS electronic module - replaced by dealer in Virgina only problem. Drove 300 miles to pick up - has one of first 6.0 liter engines. Great power. Engine does not show up as option in parts stores until 2001.

Favorite Features

Suggested Improvements

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Service 4WD Light

Written by: cw4915e on 02/22/2005

Vehicle

1999 GMC Sierra 2500 2 Dr SLT Extended Cab SB

Review

4WD light comes on intermittently lately. Poor troubleshooting procedures from a Chilton manual led me to replace the front diff actuator motor. Seems the real culprit is a sticky selector switch. Humidity may be affecting this switch, apparently the resistors are shot for each position and loses ability to keep voltage signal to transfer case module. Original battery lasted 6 years so that was awesome to get over 6 years from a battery. Also developed a leak at the front differential. First thought it was the output seal but ended up being the plastic vent cap that screws into the diff.

Favorite Features

4 wheel disc brakes, 6.0L engine, tow/haul feature, large console, overhead console, more room in extended cab with new body style 3rd door

Suggested Improvements

More durable 4WD switch, better vent design for front diff,

1 out 1 people found this review helpful

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