PH3506
Don't buy a Fram they have cardboard end caps instead of steel Purolater, Wix, Donaldson are all better
pf59 AC Delco
1999 Chev 5.3L same as pf59,also current pf61
At the base of the engine on the right side. You will need to be under the vehicle. Also, make sure to replace with PF58 instead of PF59 as indicated by the service manual. It is a misprint. PF 59 will cause an oil leak at the crankshaft position sensor. According to Sewell Cadillac, the correct oil filter is AC Delco PF61. If your not sure like I was, call your local dealer or auto parts store. They will all tell you that it is the PF61. There is actually another posting about the 2004 Trailblazer's oil filter on this web-site confirming the PF61. Check it out for yourself. most trailblazers have skidplates there is a access panel use flat or Phillips screwdriver to open i use the band wrench lol