The information provided here has been supplied by our customers and has not been confirmed, use it as a guide,
please correct any errors that you do find.
please correct any errors that you do find.
How do I find out if my PCM/ECM is a PASSkeyII type VATS:
If you are not sure you can just to ask us if we know, email us with the vehicle information (Make, Model, Engine size and Year) of the donor vehicle that your PCM/ECM came from.
If your PCM/ECM (your engine computer) has a pin labled VATS, fuel enable or Circuit 229 then yours is a PASSkeyII type system - Our bypass module WILL work for you.
Any GM PCM/ECM made from 1986 to 2002 could be a PASSkey type VATS system, which our bypass module would work on.
If the vehicle that the PCM/ECM was made for had the black resistor pellet in the metal part of the ignition key then yours should be the PASSkeyII type system - Our bypass module SHOULD work for you. You should still email us with the vehicle information (Make, Model, Engine size and Year) so that we can confirm for you.
Here is just a small list of vehicles and years using the PASSkeyII VATS.
Corvette - pre 1996 with some exceptions, before ordering confirm that your PCM/ECM has a VATS pin (AKA fuel enable or circuit 229)
Camaro - pre 2003
Any GM F body - 1986 to 2002
Monte Carlo - pre 1999
Bonneville - pre 2000
Firebird - pre 2004
Grand Prix 1994 to 1999
Trans Am - pre 2004
Le Sabre - pre 2000
GM Trucks - pre 99 (there may be some exceptions)
And there are many, many more
How do I know if I need a 30 Hz VATS bypass module:
From 1986 to 93 some PCMs used a 30 Hz version of the VATS signal, the only way to know if yours is this type is if it is on our known 30 Hz list. We have both versions available, the standard as well as the 30 Hz. If you order the standard VATS bypass or the 30 Hz VATS bypass module and find out later that you needed the other type, you can send it back for exchage as long as it is still in like new condition. You will have to pay for re-shipping. If you are not sure as to which you need we highly recommend that you puchase the DFVATS. The DFVATS (Dual-Frequency VATS) has both signals types, all in one module.
Where is the VATS pin on my PCM, how do I find it:
The VATS signal wire will be labeled (in your vehicles service manual) as VATS, Fuel enable wire or circuit number 229 and is normally a dark blue wire. The pin number at the PCM varies depending on application:
TBI/TPI 89-92 -------- pin# B6 (might be a white wire instead of dark blue)
TBI/TPI 91-92--------- pin# F10 of the ECM's 32pin E-F connector.
LT1 92-93 -------------- pin# 19 ("A19") of the PCM's 32 pin red connector
LT1 94-97 -------------- pin# 25 ("A25") of the PCM's 32 pin red connector
LS1 1998 --------------- pin# 11 of the PCM's 80 pin red connector
LS1 99-02 -------------- pin# 30 of the PCM's 80 pin red connector
3.8L V6 95-97 -------- pin# 55 of the blue PCM connector
3.4L DOHC V6 95 ---pin# A14
PCM# 16187424 -----pin# D6 of the PCM's C3 connector
If your Pin location is different from that listed above Please let us know so that we may update our information.
The VATS/Fuel enable wire can also be found on the BCM’s 10 pin blue connector, at position 'E' or position A3 . In older vehicles the BCM may be called the TDM (Theft Deterrent Module), CCM or PASSkeyII/VATS decoder module.
Will I need anything else if I am using this for a remote start system:
No, as long as your are using a remote start system to enable the starter our VATS bypass module is all that you will need. The security warning light may come on, if you wish to diable it just cut the wire that goes from the BCM to this light.
Will I need anything else if I am using this to bypass my failing VATS system:
If this is the complete system (all the other computer modules are still there) your vehicle may also disable cranking, our module only enables the fuel injectors. If this is the case, you will need to find and bypass the crank enable/disable relay by rewiring this relay (add a jumper across it) or you can bypass it by using another relay or remote start system to activate the starter solenoid when the ignition key is in the cranking position.
Also the security warning light may still come on, the easiest thing to do is just cut the wire that goes from the BCM to this light.
Known PCMs or vehicles that used the 30 Hz VATS:
1987 Camaro RS (The 88,90 & 92 may or may not be 30Hz)
1989 Camaro RS (The 88,90 & 92 may or may not be 30Hz)
1991 Camaro RS (The 88,90 & 92 may or may not be 30Hz)
1993 Camaro (The 88,90 & 92 may or may not be 30Hz)
1989 Firebird (The 88,91 & 92 may or may not be 30Hz)
1990 Firebird (The 88,91 & 92 may or may not be 30Hz)
1990-93 Cadillac Deville (The 89 may or may not be 30Hz)
1993 Oldsmobile 88
1993 PCM# 16187424
1993 PCM# 16159278
1991-93 PCM# 1227730
Please Note: The information above has been supplied by our customers, it may contain errors. In some cases GM may have switched VATS signal types during a production year. Unless you know what your specific vehicle needs, we highly recommend that you upgrade to the DFVATS and avoid any installation headaches.