Yes, you can just test the ones you have access to. The tool is very small and just plugs into the injector connector. I also found a TSB 09-06-03-004D that may apply.
Subject: Intermittent No Crank/No Start, No Module Communication, MIL, Warning Lights, Vehicle Messages or DTCs Set by Various Control Modules - Diagnosing and Repairing Fretting Corrosion (Disconnect Affected Connector and Apply Dielectric Lubricant)
2011 and Prior GM Passenger Cars and Trucks
This repair can be applied to ANY electrical connection including, but not limited to: XXXXX XXXXX electrical, in-line connections, powertrain control sensors, etc. DO NOT over apply lubricant to the point where it prevents the full engagement of sealed connectors. A light coating on the terminal surfaces is sufficient to correct the condition.
This bulletin is being revised to update the Attention statement and add the 2011 model year. Please discard Corporate Bulletin Number 09-06-03-004C (Section 06 - Engine/Propulsion System).
Some customers may comment on any of the following conditions:
|- ||An intermittent no crank/no start |
|- ||Intermittent malfunction indicator lamp (MIL) illumination |
|- ||Intermittent service lamp illumination |
|- ||Intermittent service message(s) being displayed |
The technician may determine that he is unable to duplicate the intermittent condition.
This condition may be caused by a buildup of nonconductive insulating oxidized debris known as fretting corrosion, occurring between two electrical contact surfaces of the connection or connector. This may be caused by any of the following conditions:
|- ||Vibration |
|- ||Thermal cycling |
|- ||Poor connection/terminal retention |
|- ||Micro motion |
|- ||A connector, component or wiring harness not properly secured resulting in movement |
On low current signal circuits this condition may cause high resistance, resulting in intermittent connections.
On high current power circuits this condition may cause permanent increases in the resistance and may cause a device to become inoperative.
Fretting corrosion looks like little dark smudges on electrical terminals and appear where the actual electrical contact is being made. In less severe cases it may be unable to be seen or identified without the use of a magnifying glass.
DO NOT apply an excessive amount of dielectric lubricant to the connectors as shown, as hydrolock may result when attempting to mate the connectors. Use ONLY a clean nylon brush that is dedicated to the repair of the conditions in this bulletin.
|3. ||With a one-inch nylon bristle brush, apply dielectric lubricant to both the module/component side and the harness side of the affected connector(s). |
|4. ||Reconnect the affected connector(s) and wipe away any excess lubricant that may be present. |