The GM Harmonic Damper Holding Tool (#64500) from SP Tools was developed to aid in the removal and installation of the crank bolt on the 4.2L, 3.5L and 2.8L in-line GM engines. These damper pulleys need a special tool to hold the pulley stationary for the center bolt to be removed. The pulley bolt, after installation of the pulley, factory specifications requires 110 lbs. of torque and 180° of rotation to seat the pulley properly.
This holding tool works on the following SUVs and pickup trucks: 4.2L straight 6 cyl.: 2003-and-later Chevy Trailblazer and GMC Envoy, 2003-’04 Olds Bravada and 2004-and-later Buick Ranier; 3.5L straight 5 cyl.: 2004-and-later Chevy Colorado and GMC Canyon; 2.8L straight 4 cyl: 2005-and-later Chevy Colorado and GMC Canyon.
For additional information, visit www.sptool.com.