Keyless remote not working outside of avalanche will work inside

The remote is a transmitter, there is a receiver in vehicle. I don't know year--make--model? Is there a trunk release inside vehicle? Can you use a key to unlock trunk. If trunk release is electrical, w/o more vehicle info, I can't look up wiring diagram for release mechanism. My database only covers vehicles sold in the US.

Impossible to diagnos without scan tool data from the remote control reciever....

maybe fob is damaged, and wont open with key as it may be worn , do you have a spare key to try.

Is this an issue with all 2008 HHR remotes??? Highly doubtful , probably the vehicles keyless entry system . Taking the vehicle to a qualified repair shop an having the keyless entry system checked for DTC'S - diagnostic trouble code's . Do you know what a DTC is ?
The keyless entry system is a vehicle entry device. The keyless entry system is used in conjunction with the body control module (BCM) to remotely activate certain vehicle features. Keyless entry will lock/unlock the doors, or release the rear compartment lid when a corresponding button on the keyless entry transmitter is pressed. This is accomplished by the transmitter sending a radio frequency to the remote control door lock receiver (RCDLR). The RCDLR interprets the signal and activates the requested function via a serial data message to the BCM. A low transmitter or vehicle battery or radio frequency (RF) interference from aftermarket devices, such as 2-way radios, power inverters, computers, etc., may cause a system malfunction. High RF traffic areas may also cause interference that could lead to a malfunction. Keyless entry allows you to operate the following components:
• Door locks
• Liftgate lock
• Remote rear doors (Panel only)
• Vehicle locator/panic alarm
• Illuminated entry lamps
• Remote vehicle start
The keyless entry system has the following components:
• Keyless entry transmitters
• Keyless entry antenna
• 2 Way Advanced Remote Start RCDLR
• BCM

Guessing will not fix this .

is the chech engin light on

when you replace the battery in a newer vehicle the computer module becomes reset and the codes for you hand transmitter are deleted. you need to take your vehicle in to have it reset. this will help you.

If your keyless entry remote has never worked it either needs to be programmed to the vehicle or it is the incorrect remote part number for they vehicle. First step is to call your local dealership, ask for service, then verify your vehicle came equipped with the keyless entry option and verify the key fob part number. When calling the dealer have your vin# handy, they will need that. Once you have verified your vehicle has keyless entry option and you have the correct keyless entry remote part number then find a locksmith to program the remote to your vehicle. We suggest a locksmith because they are usually more affordable than the dealer and they come to you.

If your keyless entry remote has worked before and it just stopped working, here are a few tips to try to get it working again:

1) Change the battery
Batteries don't last forever, you'll be surprised how often it's just a dead battery! Search our YouTube channel on how to change a key fob battery for your specific year, make, and model!

2) Wipe the board
The board inside your remote can get a lot more filthy than you think! When the board is dirty it can prohibit the contact to the circuit board when you push down on the button. Simply wiping the circuit board off can make your key fob like new again!

3) Get it checked
Go to your local hardware store like AutoZone or Oreilly's. They usually have a RF frequency tester. This little gadget will let you know if your key fob is sending a signal. If it is, you may need to reprogram your key fob to your vehicle

4) The old car battery reset trick
I know this sounds absurd, but it works sometimes and is worth trying. If you exhausted all of the options above, disconnect both terminals on your car battery for 10 minutes. Then reconnect them and try your key fob. This has worked for many people and I have no idea why. If you do, please comment below to explain.

5) New fob!
It might be time for a new key fob! No need to dread over the expensive costs of a new key fob, at Keyless Entry Remote Fob Inc., you can get a refurbished one for a very affordable price! You won't even be able to tell the difference. Just search your vehicle make, model, and year to purchase a key fob or give us a call at 402-671-5100.

The rear doors will not lock with the keyless remote, the drivers master switch

Regarding the remote transmitter issue: Take the remote transmitter to your Toyota dealer. Ask them to test your transmitter with their hand-held RF detector. All Toyota dealers are required to have one of these devices. The RF detector will test the remote to see if it is indeed transmitting the proper RF out of the transmitter, and the strength of the RF signal. If there is no signal, the remote has failed (unfortunatly common), and the remote will need to be replaced and reprogrammed to the vehicle. I do this quite regularly, and rarely do I tell customers taht they need to spend 800 dollars for such a simple diagnosis/fix. The keyless system is very reliable. I rarely change the ECU for the keyless, unless somebody somehow gets the ECU wet, then it def needs replaced. Hope this helps.

Lock all the doors from the inside (with all the doors closed), unlock your driver's door by manually lifting the lock, then press it back down after you are out - this will prevent the alarm from sounding when you use the key to unlock the door.