2000 Blazer OBDII - The 1947 - Present Chevrolet & GMC Truck Message Board Network

Malo83 · 03-02-2008, 01:19 AM

My wife took her Blazer in for it's semi-annual smog inspection and it failed for the first time

Passed the sniffer test but the OBDII SELF TEST PORTION IS WHAT FAILED!!! the truck runs great and I have no Check Engine light during operation. Took it to another test site and they read the same problem!!! it's the 4.3 V6 and this has me stumped

anybody else run into this problem.

Malo83 · 03-13-2008, 09:07 PM

Fixed !!! replaced the thermostat which was stuck open

03-02-2008, 01:19 AM	#1
Malo83 Cruzzzn' Vet Join Date: Jan 2005 Location: Porterville,Ca. Posts: 1,918	2000 Blazer OBDII My wife took her Blazer in for it's semi-annual smog inspection and it failed for the first time Passed the sniffer test but the OBDII SELF TEST PORTION IS WHAT FAILED!!! the truck runs great and I have no Check Engine light during operation. Took it to another test site and they read the same problem!!! it's the 4.3 V6 and this has me stumped anybody else run into this problem.

03-13-2008, 09:07 PM	#2
Malo83 Cruzzzn' Vet Join Date: Jan 2005 Location: Porterville,Ca. Posts: 1,918	Re: 2000 Blazer OBDII Fixed !!! replaced the thermostat which was stuck open

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