GMC 2003 Envoy - Manual (Page 168)

□id vou just drive through a deep puddle ûf water^
It so, your electrical system may be wet. The condition
will usually be corrected when (he electncal syslem
dries out A lew driving trips should lum (he lighl off^
Have you recently changed brands ol fuel?
If &Di be sure to fuel your vehicle w№ quality fuEî.
See
Gssoiine Oçianç on page 5-5. Poor fuel quality will
cause youf angirie ncl lo run as effictenlly as dosigned.
You may noNoe Ihls as sfaliing af(er slaii-up, slailing
when you put ihB vehicle mto gear, misfiring, hssitalion
on acceleration or stumbling on acceleration. (These
conditions may go away once the engine is warmed up.)
This will be delected by Ihe systern and cause the
light to (urn on.
fr you OMperienge one or more of these conditions,
change the fuel brand you use. if will require at least
one full tank of the proper fuel to turn the fight off
If none ol the above sieps have made the light turn off,
have your dealer or quailfiod service center check
Ihe vehicle. Your dealer has the proper lesl oquipmeni
and diagnostic tools to Ii>r any mechanrcal or eleclhcal
problerns thaï may have developed.
Emissions Inspection and Maintenance
Programs
Somo gtata/provincial and local governments hav-e or
may Ьeg^n programs lo mspecl Ihe emission conlroi
equipment orr your vehicle. Failure to pass iHa
tnspeolion could prevent you from getting a vehicle
regisl ration.
Here are богтиэ things you need to know to help your
Vehicle pass an inspection:
Your vehicle will nqt pass this inspection if the SER'/ICE
ENGINE SOON or CHECK ENGINE light is on or not
working properly.
Vour vehicia wifi not pass this Inspection if the OSD
(on-board diagnostic) system determines that crltrcal
emissEon control systems have nol been completely
diagnosed by the system. The vehicle would be
considered not ready for inspection. This can happen if
you have recently replaced your battery or if your
battery has run down The dtagrrostic system Is
designed lo evaluate critical emission control systems
during normal driving This may take several days
of routine driving. If you have done This and your vehicle
etill does not pass the inspection for lack of OBD
systefTi readiness, your dealer or qualified servree
center lo prepare the vehicle for inspection.
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