DIESEL TPS SETTING SERV.SPECS IMPROVE PERFORMANCE. Chevrolet Chevy K Pickup

Subject: 6.2 DIESEL THROTTLE POSITION SWITCH (TPS) SETTING FEDERAL AND CALIFORNIA

Vehicles Affected: 1982 C-K WITH LH6 L.D. 6.2L DIESEL ENGINE

Setting of the throttle position switch (TPS) on 6.2L diesel LH6 engine (L.D.), must be correct to assure proper engine and transmission operation.

Chart 1 displays the settings to use for the various Nationwide/ Federal/California engine transmission configurations. Locate the part number on the face of the switch. Refer to the chart column listing that part number. Using the other vehicle parameters listed, a gage bar setting can be determined. The 1982 Light Duty Truck Service Manual on page 6C6-2 (Figure 6C6-4) does not specify the dimensions of the gage bar settings.

Reference is made to Kent-Moore tools available for this setting.

CHART 1 1982 MODEL YEAR

THROTTLE GUAGE BAR SWITCH POSITION -------------- GUAGE USAGE ALT TRANS MODELS SWITCH P/N CLOSED OPEN P/N ----- ---- ----- ------ ---------- ------ ----- ----- Nation- 0.646in 0.668in wide ALL Man. ALL 14050405 (16.41mm) (16.97mm) J-33043-2

Federal ALL Auto. ALL 14033943 0.646in 0.668in (16.41mm) (16.97mm) J-33043-2

CALIF. ALL Auto. C/K 10/15 14033943 0.646in 0.668in P/U (16.41mm) (16.97mm) J-33047-2 C/K 20/25 P/U

CALIF. ALL Auto. C/K 14050408 0.602in 0.624in SUBURBAN (15.29mm) (15.85mm) J-33043-4 K 10/15 JIMMY BLAZER

General Motors bulletins are intended for use by professional technicians, not a "do-it-yourselfer". They are written to inform those technicians of conditions that may occur on some vehicles, or to provide information that could assist in the proper service of a vehicle. Properly trained technicians have the equipment, tools, safety instructions and know-how to do a job properly and safely. If a condition is described, do not assume that the bulletin applies to your vehicle, or that your vehicle will have that condition. See a General Motors dealer servicing your brand of General Motors vehicle for information on whether your vehicle may benefit from the information.