Genuine Holden Timing Belt Tensioner GM12644510 – Colorado RG 2.8L Duramax Diesel ACDelco AC0135 • Selected models (2006–2013)

• Selected models (2006–2013)

5• By-Pass Valve: Yes• Anti Drain Back Valve: Yes• Dual Flow: No• Cross Reference: Ryco Z436

• Condor Series• MK / LK / PK Series

Spider)• BMW (3 Series

2L• Zafira 2

Genuine Holden Timing Belt Tensioner GM12644510 – Colorado RG 2.8L Duramax Diesel ACDelco AC0135 • Selected models (2006–2013)The Genuine Holden GM12644510 Timing Belt Tensioner Assembly is an OEM replacement component designed for Holden Colorado models fitted with the 2. 8L Duramax diesel engine. The timing belt tensioner is a critical component of the engine timing system, maintaining the correct tension on the timing belt to ensure accurate camshaft and crankshaft synchronization. A worn or faulty tensioner can cause belt noise, incorrect timing, engine damage, or