AC Delco PF-59 and PF-61

[Triple_Se7en]

Both of these filters are shaped the same... supposedly both work in my 2004 Chevy Colorado 3.5L. The PF-59 was the factory mounted filter.

Looking inside, the 59 looks busy - the 61 appears pretty blank..... looks mega free-flow with no anti drainback valve that I can see on either end. It's emptyness reminds me of filters from the 70s.

Anyone here observed both of these filters?.... maybe shed some light on their differences?

 

[JHZR2]

cut em both open and post pics!!!

JMH

 

[lubeowner]

Is the 61 a shorter filter? The only filters we use are the 59 and the Ph44 (short) for all the new Gm stuff. More info please. BTW, I am now seeing mostly all Champ filters OEM on GM now.

 

[Triple_Se7en]

They are both the same size. I examined both at PepBoys yesterday. Will continue to use the 59s for now. Can't seem to find a Motorcraft crossover number that'll work on the Colorado.

 

[Triple_Se7en]

I finally figured it out. Because my Colorado 3.5L has a vertical filter set-up, I can buy with the ADBV or without. The 59 has the valve - the 61 does not.