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Engine Controls/fuel - 6.6l (lgh, Lml) - Specifications GMC Sierra 2500

Testing & Diagnostics ~1008 words

Temperature Versus Resistance (IAT Sensor 2)

°C°FOHMS
Temperature vs Resistance Values (Approximate)
15030216
140284198
130266247
120248310
110230395
100212508
90194662
80176875
701581171
601401593
501222203
451132608
401043100
35953705
30864448
25775370
20686517
15597954
10509765
54112060
03215000
52318800
101423670
15530100
20438480
302264630
4040112500

Temperature Versus Resistance (IAT Sensor 2)

Temperature Versus Resistance (EGT Sensors)

°C°FOHMS
Temperature vs Resistance Values (Approximate)
10001832849
9001652795
8001472738
7001292680
6001112618
500932554
450842521
400752488
350662455
300572420
250482385
200392349
150302313
100212276
50122238
2577220
032200
204185
4040170

EGT Sensor 1, 2, 3 or 4

Temperature Versus Resistance (ECT Sensors)

°C°FOHMS
Temperature vs Resistance Values (Approximate)
15030247
14028460
13026677
120248100
110230132
100212177
90194241
80176332
70158467
60140667
50122973
451131188
401041459
35951802
30862238
25772796
20683520
15594450
10505670
5417280
0329420
52312300
101416180
15521450
20428680
302252700
4040100700

Temperature Versus Resistance (ECT Sensors)

Temperature Versus Resistance (EGR Temperature Sensors)

°C°FOHMS
Temperature vs Resistance Values (Approximate)
4040180000
3022120900
20483910
101459877
03243796
105032463
206824559
308618925
4010414828
5012211795
601409510
701587765
801766413
901945353
1002124511
1102303824
1202483269
1302662817
1402842444
1503022135
1603201877
1703381660
1803561476
1903741319
2003921184
2104101068
220428967
230446879
240464802
250482735
260500675
270518622
280536575
290554533
300572496
310590460
320608429
330626400
340644374
350662351
360680329
370698310
380716292
390734276
400752261
410770248
420788235
430806223
440824213
450842203
460860193
470878185
480896177
490914169
500932162
510950156
520968150
530086144
5401004139
5501022134
5601040129
5701058125
5801076120
5901094116
6001112113
6101130109
6201148106
6301166102
640118499
650120296
660122093
670123891
680125688
690127486
700129284
710131081
720132879
730134677
740136475
750138274
760140072
770141870
780143669
790145467
800147266
810149064
820150863
830152661
840154460
850156259
860158058
870159857
880161656
890163455
900165254

EGR Temperature Sensors 1 and 2

Temperature Versus Resistance (Fuel Temperature Sensor)

°C°FOHMS
15030261
14028475
13026692
120248111
110230142
100212184
90194240
80176318
70158428
60140584
50122811
45113961
401041, 150
35951, 377
30861, 660
25771, 999
20682, 450
15593, 000
10503, 700
5414, 587
0325, 740
5237, 203
10149, 160
15511, 598
20415, 000
302225, 414
404045, 770

Temperature Versus Resistance (Fuel Temperature Sensor)

Altitude Versus Barometric Pressure

Altitude Measured in Meters (m)Altitude Measured in Feet (ft)Barometric Pressure Measured in Kilopascals (kPa)Barometric Pressure Measured in Pounds Per Square Inch (psi)
Determine your altitude by contacting a local weather station or by using another reference source.
4 26714, 00056-648.1-9.3
3 96213, 00058-668.4-9.6
3 65812, 00061-698.8-10.0
3 35311, 00064-729.3-10.4
3 04810, 00066-749.6-10.7
2 7439, 00069-7710.0-11.2
2 4388, 00071-7910.3-11.5
2 1347, 00074-8210.7-11.9
1 8296, 00077-8511.2-12.3
1 5245, 00080-8811.6-12.8
1 2194, 00083-9112.0-13.2
9143, 00087-9512.6-13.8
6102, 00090-9813.1-14.2
3051, 00094-10213.6-14.8
00 Sea Level96-10413.9-15.1
3051, 000101-10514.6-15.2

Altitude Versus Barometric Pressure

Fastener Tightening Specifications

ApplicationSpecification
MetricEnglish
Accelerator Pedal Fastener9 N.m80 lb in
Air Cleaner Cover Bolt4 N.m35 lb in
Air Cleaner Outlet Duct Clamp4 N.m35 lb in
Air Intake Pipe Clamp4.6 N.m41 lb in
Camshaft Gear Access Hole Plug75 N.m55 lb ft
Camshaft Position (CMP) Sensor Bolt10 N.m89 lb in
Charge Air Cool Inlet/Outlet Pipe Clamp10 N.m89 lb in
Charge Air Temperature Sensor44 N.m32 lb ft
Crankshaft Position (CKP) Sensor Bolt10 N.m89 lb in
Crankshaft Position Sensor (CKP) Sensor Spacer Bolt10 N.m89 lb in
Electronic Brake Control Module Bracket Bolt25 N.m18 lb ft
Emission Reduction Fluid Injector Fastener25 N.m18 lb ft
Emission Reduction Fluid Tank Fastener22 N.m16 lb ft
Emission Reduction Fluid Tank Opening Filler Fastener9 N.m80 lb in
Engine Coolant Temperature (ECT) Sensor20 N.m15 lb ft
Engine Fuel Vacuum Switch25 N.m18 lb ft
Engine Wiring Harness Fastener21 N.m15 lb ft
Exhaust Differential Pressure Sensor Bracket Fastener10 N.m89 lb in
Exhaust Differential Pressure Sensor Pipe Fitting45 N.m33 lb ft
Exhaust Gas Recirculation Bracket Fastener20 N.m15 lb ft
Exhaust Gas Recirculation Cooler Fastener 153 N.m39 lb ft
Exhaust Gas Recirculation Cooler Fastener 225 N.m18 lb ft
Exhaust Gas Recirculation Valve Temperature Sensor44 N.m32 lb ft
Exhaust Temperature Sensor45 N.m33 lb ft
Fuel Bundle Fastener16 N.m12 lb ft
Fuel Cooler Fastener18 N.m13 lb ft
Fuel Feed Pipe Bracket Fastener25 N.m18 lb ft
Fuel Feed Pipe Fastener10 N.m89 lb in
Fuel Feed Pipe Fitting41 N.m30 lb ft
Fuel Filler Hose Clamp4 N.m35 lb in
Fuel Filler Hose Ground Bolt9 N.m80 lb in
Fuel Filler Housing Bolts2.3 N.m20 lb in
Fuel Filter Bracket Fastener20 N.m15 lb ft
Fuel Filter Bracket to Fuel Filter/Heater Element Housing20 N.m15 lb ft
Fuel Injection Fuel Feed Manifold Bolt25 N.m18 lb ft
Fuel Injection Fuel Rail Fuel Pressure Sensor7 N.m62 lb in
Fuel Injection Pump Adapter Bolt20 N.m14 lb ft
Fuel Injection Pump Bolt25 N.m18 lb ft
Fuel Injection Pump Gear Nut70 N.m52 lb ft
Fuel Injector Bracket Fasteners30 N.m22 lb ft
Fuel Injector Pipe Fitting41 N.m30 lb ft
Fuel Line Bracket Nut16 N.m12 lb ft
Fuel Pipe Bracket Fastener10 N.m89 lb in
Fuel Pressure Regulator Bracket Bolt/Nut10 N.m89 lb in
Fuel Pressure Regulator Screws
First Pass4 N.m35 lb in
Final Pass7 N.m62 lb in
Fuel Cooler Fastener18 N.m13 lb ft
Fuel Injector Bracket Fastener30 N.m22 lb ft
Fuel Pipe Fittings30 N.m22 lb ft
Fuel Pressure Relief Valve
First Pass60 N.m44 lb ft
Third Pass85 N.m63 lb ft
Fuel Pressure Sensor70 N.m52 lb ft
Fuel Rail Fasteners25 N.m18 lb ft
Fuel Rail Heat Shield Fasteners25 N.m18 lb ft
Fuel Rail Temperature Sensor22 N.m16 lb ft
Fuel Return Line Bracket Bolt25 N.m18 lb ft
Fuel Tank Filler Hose Clamp6 N.m35 lb in
Fuel Tank Filler Hose Ground Fastener10 N.m89 lb in
Fuel Tank Shield Bolts- Cab Chassis28 N.m21 lb ft
Fuel Tank Shield Bolts- Pickup12 N.m106 lb in
Fuel Tank Strap Bolt40 N.m30 lb ft
Glow Plug18 N.m13 lb ft
Glow Plug Control Module Fastener10 N.m89 lb in
Glow Plug Control Module Bracket Bolt10 N.m89 lb in
Glow Plug Nuts7 N.m62 lb in
Heater Inlet Pipe Bracket Bolt25 N.m18 lb ft
High Pressure Fuel Pipe Fastener10 N.m89 lb in
High Pressure Fuel Pipe Fitting30 N.m22 lb ft
High Pressure Fuel Pipe Fitting at the Fuel Pump38 N.m28 lb ft
Indirect Fuel Injector Fitting45 N.m33 lb ft
Indirect Fuel Injector Bolts25 N.m18 lb ft
Intake Air Heater Fastener10 N.m89 lb in
Intake Air Temperature (IAT) Sensor20 N.m15 lb ft
Intake Air Valve Bolt20 N.m15 lb ft
Intake Manifold Shield Bolt25 N.m18 lb ft
Manifold Absolute Pressure (MAP) Sensor Bolt10 N.m89 lb in
Mass Air Flow (MAF)/Intake Air Temperature (IAT) Sensor Screw1.5 N.m13 lb ft
Nitrogen Oxide Sensor45 N.m33 lb ft
Nitrogen Oxide Sensor Nuts10 N.m89 lb in
Oil Fill Tube Bracket Bolt25 N.m18 lb ft
Outlet Duct to Turbocharger Clamp8 N.m70 lb in
Throttle Body Assembly Bolt10 N.m89 lb in
Transmission Fill Tube Bracket Bolt25 N.m18 lb ft
Turbocharger Oil Feed Pipe Bolt34 N.m25 lb ft
Turbocharger Vane Position Control Solenoid Valve Bracket Bolt23 N.m17 lb ft
Turbocharger Vane Position Sensor23 N.m17 lb ft
Upper intake manifold brace bolt7 N.m62 lb in

Fastener Tightening Specifications

What Fuel to Use in the United States

CAUTIONUse of diesel fuel other than Ultra Low Sulfur Diesel (15 ppm sulfur maximum) or engine oil other than low ash CJ-4 oil will cause permanent damage to the DPF and related components.

In the United States, for best results use Number 2-D diesel fuel year-round, above and below freezing conditions, as oil companies blend Number 2-D fuel to address climate differences. Number 1-D diesel fuel may be used in very cold temperatures when the temperature stays below -18°C (0°F). However, the fuel will produce a power and fuel economy loss. The use of Number 1-D diesel fuel in warm or hot climates may result in stalling, poor starting when the engine is hot and may damage the fuel injection system.

It is acceptable to use diesel fuel containing up to 20 percent biodiesel (B20), but the final blended fuel must meet the same specification, ASTM D 975 (Grades No. 2-D or No. 1-D S15 commonly known as Ultra Low Sulfur diesel), as the other fuels used in your vehicle, and the biodiesel used for making this fuel must meet the latest version of ASTM specification D 6751. Biodiesel is produced from vegetable oils or animal fat that have been chemically modified to reduce the possibility of damage to the fuel system and engine. Higher concentration (i.e. greater than B20) biodiesel-containing fuels or the use of unmodified bio-oils blended into diesel fuel at any concentration is not recommended and could damage the fuel system and engine. Such damage could not be covered by your warranty. If there are questions about the biodiesel-containing fuels you are using, contact your fuel supplier.

Because of the cleansing properties of biodiesel, switching from straight diesel to a biodiesel blend can prematurely restrict the fuel filter with normal deposits in the fuel system. A fuel filter replacement might be required sooner than the recommended interval.

Diesel fuel may foam when filling the tank. This can cause the automatic pump nozzle to shut OFF, even though the tank is not full. If this happens, just wait for the foaming to stop and then continue to fill the tank.

What Fuel to Use in Canada

Canadian fuels are blended for seasonal changes. Diesel Type A fuel is blended for better cold weather starting, when it stays below -18°C (0°F). However, the fuel will produce a power and fuel economy loss. The use of Type A diesel fuel in warmer climates may result in stalling, poor starting. Diesel Type B fuel is blended for temperatures above -18°C (0°F). The emission control system requires the use of diesel fuel with ultra low sulfur, 15 ppm, content. Both low and higher sulfur fuels will be available in Canada. Only ultra low sulfur diesel fuels are available in the United States. Diesel-powered trucks must be refueled with ultra low sulfur fuel only. Use of fuels with higher-sulfur content will affect the function of the emission components and may cause reduced performance, excessive smoke and unpleasant odor.

It is acceptable to use diesel fuel containing up to 20 percent biodiesel (B20), but the final blended fuel must meet the same specification, CAN/CGSB-3.517 (ULS) in Canada, as other fuels used in your vehicle, and the biodiesel used for making this fuel must meet the latest version of ASTM specification D 6751. Biodiesel is produced from vegetable oils or animal fat that have been chemically modified to reduce the possibility of damage to the fuel system and engine. Higher concentration (i.e. greater than B20) biodiesel-containing fuels or the use of unmodified bio-oils blended into diesel fuel at any concentration is not recommended and could damage the fuel system and engine. Such damage would not be covered by your warranty. If there are questions about the biodiesel-containing fuels you are using, contact your fuel supplier.

Very Cold Weather Operation

If the vehicle is driven in very cold temperatures and can not get a winterized Number 2-D that has been adapted to cold weather or a Number 1-D, use one gallon of kerosene for every 2 gallons of diesel fuel. Once you add kerosene, run the engine for several minutes to mix the fuels. Only add kerosene when the temperature falls below -18°C (0°F), because the fuel economy and lubricating qualities of kerosene is not as good as that of diesel fuel.

In cold weather, the fuel filter may become clogged (waxed). To unclog the filter, move the vehicle to a warm garage area and warm the filter to a temperature between 0-10°C (32-50°F). Replacing the filter is not necessary.

Fuel Specific Gravity Testing

Use a J 38641-B Diesel Fuel Quality Tester to measure the fuel specific gravity (API Rating). Follow the instructions on the tool to obtain the proper temperature-adjusted value. This information must be accurate for the proper diagnosis of the fuel system.

Fuel Injector Return Flow and Fuel Pressures

The fuel injector return line pressure regulator maintains the fuel injector return line pressure at 4-11 bar (58-158 psi) while the engine is running. The engine control module (ECM) monitors injector timing, crankshaft rotational speed, and fuel pressure to determine injector performance. If the ECM detects a fault with an injector a DTC with set.

API RatingMaximum Single Fuel Injector Return Flow
30-3410 ml
35-3910 ml
40-4410 ml

Fuel Injector Return Flow Values

Water in Fuel

Sometimes, water can be pumped into the fuel tank along with diesel fuel. This can happen if the service station does not regularly inspect and clean their fuel tanks, or the fuel gets contaminated for the service stations suppliers.

If water is pumped into the fuel tank, a water in fuel light will illuminate. If the water in fuel light illuminates, the excess water must be drained from the fuel system on the vehicle.

Adhesives, Fluids, Lubricants, and Sealers

ApplicationType of MaterialGM Part Number
Anti-Seize CompoundLubricantGM P/N 88862477 (Canadian P/N 88862478)
Camshaft Gear Access Hole PlugSealantGM P/N 12346004 (Canadian P/N 10953480)
Coolant Temperature Sensor ThreadsSealantGM P/N 12346004 (Canadian P/N 10953480)
Engine Oil5W-30 OilGM P/N 19293000 (Canadian P/N 19286321)
Fuel Injection Fuel Rail BoltsSealantGM P/N 12345382 (Canadian P/N 10953489)
Intake Air Temperature Sensor ThreadsSealantGM P/N 12346004 (Canadian P/N 10953480)
Top Engine CleanerCleanerGM P/N 1052626 (Canadian P/N 993026)

Adhesives, Fluids, Lubricants, and Sealers

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