Well, I am finally in need of some help here. Vehicle is a 2000
Silverado 1500 Z71 w/ 5.3 and 62K on the clock. Truck has been
flawless for quite some time. While driving yesterday around town, I
got the Service Engine Soon light. I took Doc's advice and went to AZ
and had the code scanned. It came up as a P1416, general emissions
failure and was in there twice.
Can anyone tell me something more specific about "general emissions
failure?" I have searched quite a bit, but cannot find anything
related to that code. Just for safe measures, I reinstalled the fuel
cap, but the light has not gone out!
Is this an electric air pump? I found a metal line (roughly 3/8")
going into the top of the exhaust manifolds on each side. The drivers
side wraps from the exhaust manifold behind the engine into a T
fitting above the passenger side exhaust mainfold. From there, it
goes to some big plastic box right under the passenger side hood
latch. I am assuming that is the air pump? There is also another
hose (about 1.25" dia) coming out of the passenger side exhause
manifold going towards the belts. It then goes into some sort of
metal bracket with a plastic housing on top that has a 2 wire
connection on it. From there it looks to go under the plastic cover
covering the top on the engine. Which one of these is the A.I.R.
system? My haynes manual is useless regarding the plumbing of the AIR
system. In fact, it doesn't even mention it!
Thanks again for all the help!
firstname.lastname@example.org (derek) wrote in message
I had to take the truck to the dealer for this one. Come to find out
there was a bad pressure relief valve on the passenger side. Thanks
for all the info Doc!
I also had the P1870 code and my check engine light was not
illuminated for this. Above that, my POS harbor freight code reader
did not pick up that code either. Guess you get what you pay for when
it comes to readers.
Actually, got lucky! The dealer put in a new valve body under the
extended warranty. I am sure it's just another grenade waiting to
explode, but it should buy me 50k more or so! I will do what you
said, too, when it goes, get it to Gary somehow and let him work his
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