2001 BLACKBIRD PHASE IIX BELT FITMENT

blackbird3 · Post by **blackbird3** » Wed May 01, 2013 5:18 pm

HI, JUST CURIOUS IF ANYONE KNEW WHAT THE GM PART # WOULD BE FOR THE W/P,ALT, P.S BELT WOULD BE? I THINK THE CRANK PULLEY IS UNDERSIZED. I HAVE THE CORRECT # FOR THE A/C BELT BUT NOT THE OTHER BELT, #S WORN OFF COMPLETELY. ANY HELP WOULD BE GREAT.

Blackbird34 · Post by **Blackbird34** » Thu May 02, 2013 1:09 am

My Blackbird was upgraded to the Phase IIX package in 2006. GMMG used Gates belts at that time in my car. My main drive belt Gates part # is

KO60750. The accessory belt is Gates # KO40378. The crank pulley is definately undersized to free up some power. I would assume the same under drive pulley was used on all PH IIX cars but......you never know. Hope that helps!

NCGuy68 · Post by **NCGuy68** » Thu May 02, 2013 3:56 am

@Blackbird34 wrote:My Blackbird was upgraded to the Phase IIX package in 2006. GMMG used Gates belts at that time in my car. My main drive belt Gates part # is

KO60750. The accessory belt is Gates # KO40378. The crank pulley is definately undersized to free up some power. I would assume the same under drive pulley was used on all PH IIX cars but......you never know. Hope that helps!

Good info Blackbird34.

Another way to measure the approximate lenght of a belt is to use a cloth measuring tape or even a strong, thick piece of string. The resulting lenght can many times be cross referenced to a GM belt number. A NAPA store or local GM dealer can usually find a GM number that matches the 'found' lenght.

NCGuy68 · Post by **NCGuy68** » Thu May 02, 2013 4:11 am

OPS, I can't spell tonight..... :doh: .

That should be 'Length' as in 'Belt Length'.

blackbird3 · Post by **blackbird3** » Thu May 02, 2013 1:13 pm

THANKS FOR THE INPUT, I CAME UP WITH THE SAME # FOR THE A/C BELT, I FIGURE BOTH BELTS ARE CLOSE TO 80MM SHORTER THEN STOCK. I WILL MATCH UP THE K060750 # TO GM. TOM