[bowtiebandit]

I dont have your VIN but if this applies giver it a shot but if you re still getting the nasty "mud" search the Blazer forum for the flush info there.

TEMPERATURE GAUGE READS TOO HIGH (INSTALL RESISTOR) #43-81-07 - (03/29/1994)
SUBJECT: TEMPERATURE GAUGE READS TOO HIGH (INSTALL RESISTOR)

MODELS: 1993-94 CHEVROLET CAMARO - PRIOR TO VIN R2173167 1993-94 PONTIAC FIREBIRD - PRIOR TO VIN R2229373

CONDITION:

THE CUSTOMER MAY COMMENT THAT THE TEMPERATURE GAUGE READS TOO HIGH, THAT THE NEEDLE IS IN THE RED ZONE, OR THAT THE ENGINE IS OVERHEATING.

CAUSE:

THE CALIBRATION OF THE TEMPERATURE GAUGE IN THE CLUSTER IS INCORRECT. THE CLUSTERS WERE CORRECTED IN PRODUCTION AFTER VIN R2173167 (CHEVROLET) AND R2229373 (PONTIAC).

CORRECTION:

1. VERIFY THAT THE CONDITION EXISTS BY COMPARING THE CLUSTER GAUGE READING WITH THE READING FROM THE ECM TEMPERATURE SENSOR, USING THE TECH 1. THE 3/4 MARK ON THE GAUGE IS ABOUT 235 DEGREES FAHRENHEIT (113 DEGREES CELSIUS).

2. DISCONNECT THE TEMPERATURE GAUGE SENSOR CONNECTOR. THE SENSOR IS SHOWN IN THE 1994 SERVICE MANUAL, PAGE 8A-201-27, FIGURE 52 (V-6), AND PAGE 8A-201-16, FIGURE 29 (V-8).

CUT THE DARK GREEN WIRE, AND SPLICE IN A 10 OHM, 1/2 WATT RESISTOR. SOLDER THE CONNECTIONS, AND PROTECT WITH SHRINK WRAP TO INSURE THAT THE CONNECTION IS WATERPROOF. THE RESISTOR CAN BE OBTAINED FROM A LOCAL ELECTRONICS SUPPLY STORE. ONE SUCH SOURCE IS RADIO SHACK, P/N 271-001 OR EQUIVALENT.

RECONNECT THE TEMPERATURE GAUGE SENSOR CONNECTOR.