Pull the GM Diagnostic OBD CODES .. how ?

[Stealth]

When your Caddy has problems, WE NEED THE CODES. PLEASE PULL THE CODES ! GM uses OBD-1, OBD-II, OBD-III Codes Ohh, you dont know how to do it? Here are a couple of help threads: this 1st one is very detailed .. http://www.cadillacforum.com/m_11904/tm.htm these have additional info and links http://www.cadillacforum.com/m_12932/tm.htm http://www.cadillacforum.com/m_15478/tm.htm hhttp://www.cadillacforum.com/m_17425/tm.htm

[lferrebee]

how do i go about resetting my obd systems I had some old codes and trying to make sure the ones i have at the momment is new and needto know how to fix them . PO171 & PO174 both are too lean codes, PO300 ramdon misfire but it not, PO603 memory error,P1632 THEFT SYETEM FUEL, AND last is the TCC PO741stuck off

[lferrebee]

forget to tell you the year is 1996 deville

[G.A.R.Y.]

Disconnect the battery for a few minutes.

or try this

PRESS:
OFF & WARM (red button) together
- the D.I.C. will light up the instrument cluster like a Christmas tree
- the D.I.C. will start diagnostics, as soon as it starts displaying ..

PRESS:
LO
- until " ECM " comes up

PRESS:
HI
- until " CLEAR CODES ? " comes up

PRESS:
HI
- press only once
- response will be in a few seconds: CODES CLEARED

you are done ...

PRESS RESET and you are back to normal

[othello1968coupe]

Do older Cadillacs (1968's) have codes?

[jons95sls]

do you clear the codes on a 95 sls the same way?

[Stealth]

Originally Posted by othello1968coupe

Do older Cadillacs (1968's) have codes?

no ...

Originally Posted by jons95sls

do you clear the codes on a 95 sls the same way?

yes ...


.

[jons95sls]

thank you.

[jons95sls]

i tried to clear my codes i never found the ecm to clear it now what do i need to do?
thank you

[slowroll]

After all the codes are displayed, DIC should display "PCM". Press high blower button and you will be in the ECM/PCM module options. Press low for no and high for yes for what comes up. on 82-95 Cadillac powered models scanner is not required, diagnostics intended for use with "on-board diagnostics". 80-81 DFI or 8-6-4 are unique to themselves, still have "on board" but access and data are different. Cimmaron and 86-96 RWD Fleetwood or Brougham require scanners. EFI - no onboard, no scanner, nor codes "Symptom Charts"...FSM,DVOM, and a prayer or two.