2003 chevy silverado injector 2 fuse blows when ignition is turned on

Cadillac v8, no engine told but is a v8
and ive never seen any car with 8 injector fuses but we know it has 2. 1 per bank.
the fuse if good. (was)
blows only if 1 coil shorts, a 10 ohm injector uses 10 times less current than a fuse.
and are not ever gang fired, 1 at time sequentially. but ganged is 4amps, so moot.


and shorted coils in the injector do that.
or omg blown up PCM that turned them all on at one time
learn that injectors are PCM modulated to keep them cool
so on time super short. (called duty cycle)
i'd do not agree on sticking theory at all. sure fuel rates wrong./
ok bank 2 fuse blew.
it can only be this bank 2. current overload.

1: fuse was a china clone junk and fail try buying Little fuse/BUSS branded fuses. not junk fuses, or last owner did sure, they did., endless.
2: bad wiring sure, if they short sure the fuse blows or pcm blows up as a result. (PnP injectors,)_
3: bad PCM , injector driver transistors short and BOOM fuse blows.(repeats easy)
4: injector coil shorts if car (secret) 10 ohm coils and is way less , it is a bad injector, 20%error max. IMO
use any DMM meter in lowest range ohms and test each injector coil
all will read the same as a set, (at 1 temperature all)
did I miss any, I think not.

Check stored ODBII codes for injector circuit high/low faults (P0200). Implies a injector control wire short or failing injector. Further troubleshooting is required, test don't guess.

Check injector #2 control wire for signs of abrasion or rodent damage. Use an ohm meter to compare resistance of number 2 injector to other injectors. Search internet for how to... plenty of videos.

if the fuse is blowing you have a short

try the distributor cap

IF YOU HAVE CKED FOR A SHORT THEN MOST LIKELY YOU HAVE A BAD INJECTOR. YOU CAN UNPLUG ONE INJECTOR AT A TIME UNTIL IT STOPS BLOWING FUSES OR YOU CAN TAKE IT TO A REPUTABLE TECH WHO CAN HOOK IT UP TO A SCAN TOOL AND IT SHOULD SHOW THE BAD INJECTOR.

Hi there:
Here is a picture showing the EGR valve on the 4.8 Litre V8. The numbers below go with the picture. The arrow points to the front of the truck.

(1) Fuel Injector 2 Connector
(2) Throttle Actuator Control (TAC) Motor Connector
(3) Throttle Actuator Control (TAC) Motor
(4) Exhaust Gas Recirculation (EGR) Valve Connector
(5) Exhaust Gas Recirculation (EGR) Valve
(6) Fuel Injector 6
(7) Ignition Coil 2


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Thank you for using FixYa, have a nice day.

Hi there:
Here is a picture showing the EGR valve on the 4.8 Litre V8. The numbers below go with the picture. The arrow points to the front of the truck.

(1) Fuel Injector 2 Connector
(2) Throttle Actuator Control (TAC) Motor Connector
(3) Throttle Actuator Control (TAC) Motor
(4) Exhaust Gas Recirculation (EGR) Valve Connector
(5) Exhaust Gas Recirculation (EGR) Valve
(6) Fuel Injector 6
(7) Ignition Coil 2


Hope this helps; also keep in mind that your feedback is important and I`ll appreciate your time and consideration if you leave some testimonial comment about this answer.

Thank you for using FixYa, have a nice day.

Under the hood, injector one 15amp for odd number injectors, and

injector two 15amp for even number injectors. good luck!

check wiring harness for injectors,and the injectors Short to ground in harness or shorted injector. common problem with injectors are shorts to ground.

sounds like a short in the wiring from the fuse and the fuel injector junction block. GM like most fuel injection systems control injector firing by the computer providing ground to each injector in pairs or individually. The fuel injector fuse provides power to the injectors using splices therefore enabling one wire to feed 6 injectors. A shorted wire at any of these wires will blow the fuse. On one rare incident I found a faulty computer caused the fuse to blow. A shorted injector will just cause a rough running problem due to the injector stuck either open or closed.