Alarm R/S in 97 Blazer

If you have on board relays (viper should) then no. as far as your door open it is white (-) at the keyless module (This wire catches all doors, but reads the delay. To keep the alarm from reading the delay, place a diode in-line on the white door trigger wire with the anode towards the keyless module. Attach your door trigger wire to the cathode side of the diode. On non-keyless models there is a module with 5 wires located where the keyless normally resides. The white wire there catches only the front two doors. To catch the rear doors use the white wire at the drivers side rear pin switch. Also found at the TRW keyless entry module mounted to the under dash panel on drivers side. With the module unplugged, the drivers door lock will no longer function.) Hope that helps ya... Hymer

Forgot to mention that the Blazer does not have factory keyless entry. Thanks

Yep, door open you should see ground, and as for the rear hatch, I can't tell you right now because my computer decided to through a fit and I can't get into my wireing info... very fustrating...