1998 GMC pick-up

DELZEN

MEMBER
1998 GMC C1500

I have a 1998 4X4 gmc 1500 half ton. It's a 5.7L V8, with 223,000km automatic tranny. My question is, I ran a diagnostics check with an ODBII code reader, and these are the codes that came up. 1404--EGR Valve closed pintle position, 430--Catalyst system efficiency below threshold (bank 2), 405--Exhaust gas recirculation sensor A circuit low. I need to know what the codes are, what the EGR Valve is and looks like, and anything else u can tell me about all the codes.

Thursday, June 14th, 2007 AT 11:06 AM

2 Replies

TROY WIL

MEMBER
4 POSTS

I have 1998 gmc 2 wheel drive 78000mil. Im just know experiencing problems so I can't really answere your questions I can tell you that they have a book at auto zone. I have one questipon for you have you ever experienced a thunk in the rear end of your truck. I have replaced u-joints took brakes apart spent plenty of time looking for obvious. Curious if you have had ever had same problem, if so how did you solve problem. Troy

Was this

answer

helpful?

Yes

No

Saturday, March 1st, 2008 AT 9:28 AM

LWHEMPERLEY

MEMBER
4 POSTS

I ALSO HAVE A 98 GMC & HAVE REPLACED THE EGR
& CATS THE EGR IS ON THE FRONT OF THE ENGINE
BLOCK JUST IN FRONT OF THERMOSTAT HOUSING
IT IS ELECTRONIC ON THIS MODEL AND WILL RUN
ABOUT $139 IT IS A SIMPLE TO BOLT INSTALLATION, YOU WILL NEED TO GET AS MUCH CARBON BUILD UP AS POSSIBLE OUT OF THE MOUNTING POINT. THE CAT BELOW THRESHHOLD
IS ALSO TYPICAL FOR THE MILES THEY WILL RUN
ABOUT $120 A PIECE THIS MODEL HAS 2. HOPE THIS HELPS

Was this

answer

helpful?

Yes

No

Wednesday, March 5th, 2008 AT 11:17 AM