Mike.....Here are the Fuel Rails, from a 99" to 2000" and from a 2005" to 2006"....both show what Engines/RPO Codes these rails are for....
Chevy 1999-2000 CK1, 2, Fuel Injector Rail, (LM7/5.3T, LR4/4.8V, LQ4/6.0U)....Number #9 is the Fuel pressure Reg.
GMC 2005-2006 CK, Fuel Injector Rail, (LR4/4.8V, LM7/5.3T, LQ4/6.0U, LQ9/6.0N, L33/5.3B, L59/5.3Z, Except KL6, KL8)....as you can see....no Fuel Pressure Reg....on these fuel rails
Of course, you went above and beyond. I now have my answer. I have an L59 engine. No regulator on the rail. Damn you GM, you took away my ability to change the fuel filter and the regulator!!!:grrrrrr: Whats next? In a few years am I going to have to go to a dealer to fill it up with fuel!!
Sorry Mike......:neutral:.....I do feel your Pain!!!!
Originally Posted by Pikey